20771070964 has 24 divisors (see below), whose sum is σ = 41545192640. Its totient is φ = 8901233856.

The previous prime is 20771070953. The next prime is 20771070979. The reversal of 20771070964 is 46907017702.

It is a self number, because there is not a number n which added to its sum of digits gives 20771070964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740752 + ... + 768280.

Almost surely, 2^20771070964 is an apocalyptic number.

It is an amenable number.

20771070964 is an abundant number, since it is smaller than the sum of its proper divisors (20774121676).

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

20771070964 is a wasteful number, since it uses less digits than its factorization.

20771070964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54487 (or 54485 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 20771070964 in words is "twenty billion, seven hundred seventy-one million, seventy thousand, nine hundred sixty-four".