21136976312 has 16 divisors (see below), whose sum is σ = 39833010360. Its totient is φ = 10514840224.

The previous prime is 21136976257. The next prime is 21136976317. The reversal of 21136976312 is 21367963112.

It is a super-2 number, since 2×21136976312² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21136976312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136976317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6704318 + ... + 6707469.

Almost surely, 2^21136976312 is an apocalyptic number.

It is an amenable number.

21136976312 is a deficient number, since it is larger than the sum of its proper divisors (18696034048).

21136976312 is a wasteful number, since it uses less digits than its factorization.

21136976312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13411990 (or 13411986 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The spelling of 21136976312 in words is "twenty-one billion, one hundred thirty-six million, nine hundred seventy-six thousand, three hundred twelve".