20697372764 has 12 divisors (see below), whose sum is σ = 36235282104. Its totient is φ = 10344435024.

The previous prime is 20697372743. The next prime is 20697372821. The reversal of 20697372764 is 46727379602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051874 + ... + 1071369.

It is an arithmetic number, because the mean of its divisors is an integer number (3019606842).

Almost surely, 2^20697372764 is an apocalyptic number.

It is an amenable number.

20697372764 is a deficient number, since it is larger than the sum of its proper divisors (15537909340).

20697372764 is a wasteful number, since it uses less digits than its factorization.

20697372764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125684 (or 2125682 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 20697372764 in words is "twenty billion, six hundred ninety-seven million, three hundred seventy-two thousand, seven hundred sixty-four".