20132556 has 24 divisors (see below), whose sum is σ = 49739760. Its totient is φ = 6316032.

The previous prime is 20132513. The next prime is 20132569. The reversal of 20132556 is 65523102.

20132556 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×20132556² = 810639622186272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49141 + ... + 49548.

It is an arithmetic number, because the mean of its divisors is an integer number (2072490).

Almost surely, 2^20132556 is an apocalyptic number.

It is an amenable number.

20132556 is an abundant number, since it is smaller than the sum of its proper divisors (29607204).

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

20132556 is a wasteful number, since it uses less digits than its factorization.

20132556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98713 (or 98711 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20132556 is about 4486.9316910334. The cubic root of 20132556 is about 272.0401288833.

Adding to 20132556 its reverse (65523102), we get a palindrome (85655658).

The spelling of 20132556 in words is "twenty million, one hundred thirty-two thousand, five hundred fifty-six".