20928967512 has 32 divisors (see below), whose sum is σ = 55400209200. Its totient is φ = 6565950464.

The previous prime is 20928967511. The next prime is 20928967513. The reversal of 20928967512 is 21576982902.

It is an interprime number because it is at equal distance from previous prime (20928967511) and next prime (20928967513).

It is a super-2 number, since 2×20928967512² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928967511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25647837 + ... + 25648652.

Almost surely, 2^20928967512 is an apocalyptic number.

It is an amenable number.

20928967512 is an abundant number, since it is smaller than the sum of its proper divisors (34471241688).

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

20928967512 is a wasteful number, since it uses less digits than its factorization.

20928967512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51296515 (or 51296511 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 20928967512 in words is "twenty billion, nine hundred twenty-eight million, nine hundred sixty-seven thousand, five hundred twelve".