20751168920 has 32 divisors (see below), whose sum is σ = 46701684000. Its totient is φ = 8298413568.

The previous prime is 20751168871. The next prime is 20751168923. The reversal of 20751168920 is 2986115702.

It is a super-2 number, since 2×20751168920² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751168923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104981 + ... + 229179.

It is an arithmetic number, because the mean of its divisors is an integer number (1459427625).

Almost surely, 2^20751168920 is an apocalyptic number.

20751168920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20751168920 is an abundant number, since it is smaller than the sum of its proper divisors (25950515080).

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

20751168920 is a wasteful number, since it uses less digits than its factorization.

20751168920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128387 (or 128383 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 20751168920 in words is "twenty billion, seven hundred fifty-one million, one hundred sixty-eight thousand, nine hundred twenty".