21253076292 has 48 divisors (see below), whose sum is σ = 56962604160. Its totient is φ = 6041478912.

The previous prime is 21253076287. The next prime is 21253076293. The reversal of 21253076292 is 29267035212.

It is a self number, because there is not a number n which added to its sum of digits gives 21253076292.

It is not an unprimeable number, because it can be changed into a prime (21253076293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625617 + ... + 658712.

It is an arithmetic number, because the mean of its divisors is an integer number (1186720920).

Almost surely, 2^21253076292 is an apocalyptic number.

It is an amenable number.

21253076292 is an abundant number, since it is smaller than the sum of its proper divisors (35709527868).

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

21253076292 is a wasteful number, since it uses less digits than its factorization.

21253076292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284540 (or 1284538 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 21253076292 in words is "twenty-one billion, two hundred fifty-three million, seventy-six thousand, two hundred ninety-two".