20812967388 has 24 divisors (see below), whose sum is σ = 53959545360. Its totient is φ = 6937655760.

The previous prime is 20812967363. The next prime is 20812967389. The reversal of 20812967388 is 88376921802.

It is a happy number.

20812967388 is a `hidden beast` number, since 208 + 1 + 296 + 73 + 88 = 666.

It is a super-2 number, since 2×20812967388² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812967389) 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, 96356223 + ... + 96356438.

It is an arithmetic number, because the mean of its divisors is an integer number (2248314390).

Almost surely, 2^20812967388 is an apocalyptic number.

It is an amenable number.

20812967388 is an abundant number, since it is smaller than the sum of its proper divisors (33146577972).

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

20812967388 is a wasteful number, since it uses less digits than its factorization.

20812967388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192712674 (or 192712666 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 20812967388 in words is "twenty billion, eight hundred twelve million, nine hundred sixty-seven thousand, three hundred eighty-eight".