21992629912 has 48 divisors (see below), whose sum is σ = 46290192480. Its totient is φ = 9783935040.

The previous prime is 21992629861. The next prime is 21992629913.

21992629912 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 21992629912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21992629913) 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 11 ways as a sum of consecutive naturals, for example, 196203 + ... + 287194.

It is an arithmetic number, because the mean of its divisors is an integer number (964379010).

Almost surely, 2^21992629912 is an apocalyptic number.

21992629912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21992629912 is an abundant number, since it is smaller than the sum of its proper divisors (24297562568).

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

21992629912 is a wasteful number, since it uses less digits than its factorization.

21992629912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483472 (or 483457 counting only the distinct ones).

The product of its digits is 629856, while the sum is 52.

The spelling of 21992629912 in words is "twenty-one billion, nine hundred ninety-two million, six hundred twenty-nine thousand, nine hundred twelve".