20493136132 has 72 divisors (see below), whose sum is σ = 44228853144. Its totient is φ = 8255536128.

The previous prime is 20493136127. The next prime is 20493136163. The reversal of 20493136132 is 23163139402.

It can be written as a sum of positive squares in 4 ways, for example, as 12919959556 + 7573176576 = 113666^2 + 87024^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2918658 + ... + 2925670.

It is an arithmetic number, because the mean of its divisors is an integer number (614289627).

Almost surely, 2^20493136132 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 20493136132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22114426572).

20493136132 is an abundant number, since it is smaller than the sum of its proper divisors (23735717012).

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

20493136132 is a wasteful number, since it uses less digits than its factorization.

20493136132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925 (or 7916 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 20493136132 in words is "twenty billion, four hundred ninety-three million, one hundred thirty-six thousand, one hundred thirty-two".