21134400292 has 12 divisors (see below), whose sum is σ = 36994444956. Its totient is φ = 10564558880.

The previous prime is 21134400263. The next prime is 21134400293. The reversal of 21134400292 is 29200443112.

It can be written as a sum of positive squares in 2 ways, for example, as 17157332196 + 3977068096 = 130986^2 + 63064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21134400292.

It is not an unprimeable number, because it can be changed into a prime (21134400293) 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 3 ways as a sum of consecutive naturals, for example, 642259 + ... + 674362.

It is an arithmetic number, because the mean of its divisors is an integer number (3082870413).

Almost surely, 2^21134400292 is an apocalyptic number.

It is an amenable number.

21134400292 is a deficient number, since it is larger than the sum of its proper divisors (15860044664).

21134400292 is a wasteful number, since it uses less digits than its factorization.

21134400292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320638 (or 1320636 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 21134400292 in words is "twenty-one billion, one hundred thirty-four million, four hundred thousand, two hundred ninety-two".