20028554 has 48 divisors (see below), whose sum is σ = 38304000. Its totient is φ = 7783776.

The previous prime is 20028529. The next prime is 20028559. The reversal of 20028554 is 45582002.

It is a super-2 number, since 2×20028554² = 802285950661832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20028559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100547 + ... + 100745.

It is an arithmetic number, because the mean of its divisors is an integer number (798000).

Almost surely, 2^20028554 is an apocalyptic number.

20028554 is a deficient number, since it is larger than the sum of its proper divisors (18275446).

20028554 is a wasteful number, since it uses less digits than its factorization.

20028554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20028554 is about 4475.3272506041. The cubic root of 20028554 is about 271.5708793662.

The spelling of 20028554 in words is "twenty million, twenty-eight thousand, five hundred fifty-four".