20472896 has 56 divisors (see below), whose sum is σ = 44476416. Its totient is φ = 9308160.

The previous prime is 20472889. The next prime is 20472901. The reversal of 20472896 is 69827402.

It is a congruent number.

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, 33425 + ... + 34031.

Almost surely, 2^20472896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20472896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22238208).

20472896 is an abundant number, since it is smaller than the sum of its proper divisors (24003520).

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

20472896 is a wasteful number, since it uses less digits than its factorization.

20472896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 20472896 is about 4524.6984429904. The cubic root of 20472896 is about 273.5645132548.

The spelling of 20472896 in words is "twenty million, four hundred seventy-two thousand, eight hundred ninety-six".