20513231704 has 96 divisors (see below), whose sum is σ = 44879868000. Its totient is φ = 8610048000.

The previous prime is 20513231663. The next prime is 20513231749. The reversal of 20513231704 is 40713231502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85117024 + ... + 85117264.

It is an arithmetic number, because the mean of its divisors is an integer number (467498625).

Almost surely, 2^20513231704 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 20513231704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22439934000).

20513231704 is an abundant number, since it is smaller than the sum of its proper divisors (24366636296).

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

20513231704 is a wasteful number, since it uses less digits than its factorization.

20513231704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 20513231704 in words is "twenty billion, five hundred thirteen million, two hundred thirty-one thousand, seven hundred four".