20122554 has 16 divisors (see below), whose sum is σ = 41227200. Its totient is φ = 6543840.

The previous prime is 20122541. The next prime is 20122559. The reversal of 20122554 is 45522102.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122554.

It is not an unprimeable number, because it can be changed into a prime (20122559) 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 7 ways as a sum of consecutive naturals, for example, 40654 + ... + 41145.

It is an arithmetic number, because the mean of its divisors is an integer number (2576700).

Almost surely, 2^20122554 is an apocalyptic number.

20122554 is an abundant number, since it is smaller than the sum of its proper divisors (21104646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20122554 is a wasteful number, since it uses less digits than its factorization.

20122554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81845.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20122554 is about 4485.8169824459. The cubic root of 20122554 is about 271.9950709170.

Adding to 20122554 its reverse (45522102), we get a palindrome (65644656).

It can be divided in two parts, 201 and 22554, that multiplied together give a palindrome (4533354).

The spelling of 20122554 in words is "twenty million, one hundred twenty-two thousand, five hundred fifty-four".