21130024292 has 12 divisors (see below), whose sum is σ = 39821968956. Its totient is φ = 9752318880.

The previous prime is 21130024291. The next prime is 21130024303. The reversal of 21130024292 is 29242003112.

It can be written as a sum of positive squares in 2 ways, for example, as 9103831396 + 12026192896 = 95414^2 + 109664^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21130024291) 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, 203173259 + ... + 203173362.

It is an arithmetic number, because the mean of its divisors is an integer number (3318497413).

Almost surely, 2^21130024292 is an apocalyptic number.

It is an amenable number.

21130024292 is a deficient number, since it is larger than the sum of its proper divisors (18691944664).

21130024292 is a wasteful number, since it uses less digits than its factorization.

21130024292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406346638 (or 406346636 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21130024292 in words is "twenty-one billion, one hundred thirty million, twenty-four thousand, two hundred ninety-two".