20651651008 has 28 divisors (see below), whose sum is σ = 41209584840. Its totient is φ = 10268133632.

The previous prime is 20651650967. The next prime is 20651651011. The reversal of 20651651008 is 80015615602.

It is a happy number.

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, 889891 + ... + 912802.

Almost surely, 2^20651651008 is an apocalyptic number.

It is an amenable number.

20651651008 is a deficient number, since it is larger than the sum of its proper divisors (20557933832).

20651651008 is a wasteful number, since it uses less digits than its factorization.

20651651008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802884 (or 1802874 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 20651651008 in words is "twenty billion, six hundred fifty-one million, six hundred fifty-one thousand, eight".