20313456 has 40 divisors (see below), whose sum is σ = 54289680. Its totient is φ = 6537216.

The previous prime is 20313437. The next prime is 20313467. The reversal of 20313456 is 65431302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 5905 + ... + 8688.

It is an arithmetic number, because the mean of its divisors is an integer number (1357242).

Almost surely, 2^20313456 is an apocalyptic number.

It is an amenable number.

20313456 is an abundant number, since it is smaller than the sum of its proper divisors (33976224).

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

20313456 is a wasteful number, since it uses less digits than its factorization.

20313456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14633 (or 14627 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20313456 is about 4507.0451517596. The cubic root of 20313456 is about 272.8525011970.

Adding to 20313456 its reverse (65431302), we get a palindrome (85744758).

The spelling of 20313456 in words is "twenty million, three hundred thirteen thousand, four hundred fifty-six".