20696733660 has 72 divisors (see below), whose sum is σ = 59559660720. Its totient is φ = 5369942016.

The previous prime is 20696733647. The next prime is 20696733667. The reversal of 20696733660 is 6633769602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696733667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43845 + ... + 208124.

It is an arithmetic number, because the mean of its divisors is an integer number (827217510).

Almost surely, 2^20696733660 is an apocalyptic number.

20696733660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20696733660 is an abundant number, since it is smaller than the sum of its proper divisors (38862927060).

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

20696733660 is a wasteful number, since it uses less digits than its factorization.

20696733660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252055 (or 252016 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 48.

The spelling of 20696733660 in words is "twenty billion, six hundred ninety-six million, seven hundred thirty-three thousand, six hundred sixty".