20155432 has 32 divisors (see below), whose sum is σ = 41446080. Its totient is φ = 9112960.

The previous prime is 20155427. The next prime is 20155441. The reversal of 20155432 is 23455102.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 20013 + ... + 20995.

It is an arithmetic number, because the mean of its divisors is an integer number (1295190).

Almost surely, 2^20155432 is an apocalyptic number.

20155432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20155432 is an abundant number, since it is smaller than the sum of its proper divisors (21290648).

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

20155432 is a wasteful number, since it uses less digits than its factorization.

20155432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20155432 is about 4489.4801480795. The cubic root of 20155432 is about 272.1431268070.

It can be divided in two parts, 2015 and 5432, that added together give a palindrome (7447).

The spelling of 20155432 in words is "twenty million, one hundred fifty-five thousand, four hundred thirty-two".