20553522 has 32 divisors (see below), whose sum is σ = 45066240. Its totient is φ = 6197520.

The previous prime is 20553521. The next prime is 20553529. The reversal of 20553522 is 22535502.

It is a junction number, because it is equal to n+sod(n) for n = 20553492 and 20553501.

It is not an unprimeable number, because it can be changed into a prime (20553521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15123 + ... + 16425.

It is an arithmetic number, because the mean of its divisors is an integer number (1408320).

Almost surely, 2^20553522 is an apocalyptic number.

20553522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20553522 is an abundant number, since it is smaller than the sum of its proper divisors (24512718).

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

20553522 is a wasteful number, since it uses less digits than its factorization.

20553522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 20553522 is about 4533.5992323980. The cubic root of 20553522 is about 273.9231585188.

The spelling of 20553522 in words is "twenty million, five hundred fifty-three thousand, five hundred twenty-two".