20472936 has 32 divisors (see below), whose sum is σ = 55836000. Its totient is φ = 6203840.

The previous prime is 20472919. The next prime is 20472943. The reversal of 20472936 is 63927402.

It is a super-2 number, since 2×20472936² = 838282216920192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 20472897 and 20472906.

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, 38511 + ... + 39038.

It is an arithmetic number, because the mean of its divisors is an integer number (1744875).

Almost surely, 2^20472936 is an apocalyptic number.

It is an amenable number.

20472936 is an abundant number, since it is smaller than the sum of its proper divisors (35363064).

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

20472936 is a wasteful number, since it uses less digits than its factorization.

20472936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77569 (or 77565 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 20472936 is about 4524.7028631723. The cubic root of 20472936 is about 273.5646914184.

The spelling of 20472936 in words is "twenty million, four hundred seventy-two thousand, nine hundred thirty-six".