20696924160 has 648 divisors, whose sum is σ = 81584144460. Its totient is φ = 4844421120.

The previous prime is 20696924153. The next prime is 20696924197. The reversal of 20696924160 is 6142969602.

It can be written as a sum of positive squares in 2 ways, for example, as 20625555456 + 71368704 = 143616^2 + 8448^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 713687026 + ... + 713687054.

Almost surely, 2^20696924160 is an apocalyptic number.

20696924160 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 20696924160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40792072230).

20696924160 is an abundant number, since it is smaller than the sum of its proper divisors (60887220300).

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

20696924160 is an equidigital number, since it uses as much as digits as its factorization.

20696924160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 20696924160 in words is "twenty billion, six hundred ninety-six million, nine hundred twenty-four thousand, one hundred sixty".