20236556460 has 96 divisors (see below), whose sum is σ = 57794046912. Its totient is φ = 5288857600.

The previous prime is 20236556453. The next prime is 20236556477. The reversal of 20236556460 is 6465563202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3485560 + ... + 3491360.

It is an arithmetic number, because the mean of its divisors is an integer number (602021322).

Almost surely, 2^20236556460 is an apocalyptic number.

20236556460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20236556460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28897023456).

20236556460 is an abundant number, since it is smaller than the sum of its proper divisors (37557490452).

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

20236556460 is a wasteful number, since it uses less digits than its factorization.

20236556460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6963 (or 6961 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 20236556460 in words is "twenty billion, two hundred thirty-six million, five hundred fifty-six thousand, four hundred sixty".