20272432 has 20 divisors (see below), whose sum is σ = 41588856. Its totient is φ = 9539840.

The previous prime is 20272403. The next prime is 20272457. The reversal of 20272432 is 23427202.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36994 + ... + 37537.

Almost surely, 2^20272432 is an apocalyptic number.

It is an amenable number.

20272432 is an abundant number, since it is smaller than the sum of its proper divisors (21316424).

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

20272432 is a wasteful number, since it uses less digits than its factorization.

20272432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74556 (or 74550 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20272432 is about 4502.4917545732. The cubic root of 20272432 is about 272.6686978313.

Adding to 20272432 its reverse (23427202), we get a palindrome (43699634).

The spelling of 20272432 in words is "twenty million, two hundred seventy-two thousand, four hundred thirty-two".