20306532320 has 24 divisors (see below), whose sum is σ = 47974182984. Its totient is φ = 8122612864.

The previous prime is 20306532277. The next prime is 20306532341. The reversal of 20306532320 is 2323560302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20306532320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63457754 + ... + 63458073.

It is an arithmetic number, because the mean of its divisors is an integer number (1998924291).

Almost surely, 2^20306532320 is an apocalyptic number.

20306532320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20306532320 is an abundant number, since it is smaller than the sum of its proper divisors (27667650664).

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

20306532320 is a wasteful number, since it uses less digits than its factorization.

20306532320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126915842 (or 126915834 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 26.

The spelling of 20306532320 in words is "twenty billion, three hundred six million, five hundred thirty-two thousand, three hundred twenty".