20431896 has 32 divisors (see below), whose sum is σ = 51591600. Its totient is φ = 6742400.

The previous prime is 20431891. The next prime is 20431913. The reversal of 20431896 is 69813402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431891) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1791 + ... + 6638.

Almost surely, 2^20431896 is an apocalyptic number.

It is an amenable number.

20431896 is an abundant number, since it is smaller than the sum of its proper divisors (31159704).

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

20431896 is a wasteful number, since it uses less digits than its factorization.

20431896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8539 (or 8535 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20431896 is about 4520.1654836964. The cubic root of 20431896 is about 273.3817734230.

The spelling of 20431896 in words is "twenty million, four hundred thirty-one thousand, eight hundred ninety-six".