20771762628 has 24 divisors (see below), whose sum is σ = 48552343840. Its totient is φ = 6911792640.

The previous prime is 20771762611. The next prime is 20771762653. The reversal of 20771762628 is 82626717702.

It is a super-2 number, since 2×20771762628² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 1508893 + ... + 1522596.

Almost surely, 2^20771762628 is an apocalyptic number.

It is an amenable number.

20771762628 is an abundant number, since it is smaller than the sum of its proper divisors (27780581212).

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

20771762628 is a wasteful number, since it uses less digits than its factorization.

20771762628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032067 (or 3032065 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The spelling of 20771762628 in words is "twenty billion, seven hundred seventy-one million, seven hundred sixty-two thousand, six hundred twenty-eight".