20965651212 has 48 divisors (see below), whose sum is σ = 54608222592. Its totient is φ = 6205476480.

The previous prime is 20965651207. The next prime is 20965651277. The reversal of 20965651212 is 21215656902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1841193 + ... + 1852544.

It is an arithmetic number, because the mean of its divisors is an integer number (1137671304).

Almost surely, 2^20965651212 is an apocalyptic number.

20965651212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20965651212 is an abundant number, since it is smaller than the sum of its proper divisors (33642571380).

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

20965651212 is a wasteful number, since it uses less digits than its factorization.

20965651212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693798 (or 3693796 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 20965651212 in words is "twenty billion, nine hundred sixty-five million, six hundred fifty-one thousand, two hundred twelve".