20494672592 has 80 divisors (see below), whose sum is σ = 43880829840. Its totient is φ = 9229172736.

The previous prime is 20494672591. The next prime is 20494672607. The reversal of 20494672592 is 29527649402.

It can be written as a sum of positive squares in 8 ways, for example, as 1032256 + 20493640336 = 1016^2 + 143156^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20494672592.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20494672591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 879848 + ... + 902840.

It is an arithmetic number, because the mean of its divisors is an integer number (548510373).

Almost surely, 2^20494672592 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 20494672592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21940414920).

20494672592 is an abundant number, since it is smaller than the sum of its proper divisors (23386157248).

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

20494672592 is a wasteful number, since it uses less digits than its factorization.

20494672592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23160 (or 23154 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 20494672592 in words is "twenty billion, four hundred ninety-four million, six hundred seventy-two thousand, five hundred ninety-two".