20044557 has 16 divisors (see below), whose sum is σ = 31980480. Its totient is φ = 12334896.

The previous prime is 20044529. The next prime is 20044567. The reversal of 20044557 is 75544002.

20044557 is a `hidden beast` number, since 200 + 4 + 455 + 7 = 666.

It is not a de Polignac number, because 20044557 - 2¹⁹ = 19520269 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20044557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28203 + ... + 28904.

It is an arithmetic number, because the mean of its divisors is an integer number (1998780).

Almost surely, 2^20044557 is an apocalyptic number.

20044557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20044557 is a deficient number, since it is larger than the sum of its proper divisors (11935923).

20044557 is a wasteful number, since it uses less digits than its factorization.

20044557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57129 (or 57123 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 20044557 is about 4477.1148075518. The cubic root of 20044557 is about 271.6431893262.

Adding to 20044557 its reverse (75544002), we get a palindrome (95588559).

It can be divided in two parts, 2004 and 4557, that added together give a 8-th power (6561 = 3⁸).

The spelling of 20044557 in words is "twenty million, forty-four thousand, five hundred fifty-seven".