21292605260 has 12 divisors (see below), whose sum is σ = 44714471088. Its totient is φ = 8517042096.

The previous prime is 21292605251. The next prime is 21292605287. The reversal of 21292605260 is 6250629212.

It is a self number, because there is not a number n which added to its sum of digits gives 21292605260.

It is an unprimeable number.

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, 532315112 + ... + 532315151.

It is an arithmetic number, because the mean of its divisors is an integer number (3726205924).

Almost surely, 2^21292605260 is an apocalyptic number.

21292605260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21292605260 is an abundant number, since it is smaller than the sum of its proper divisors (23421865828).

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

21292605260 is a wasteful number, since it uses less digits than its factorization.

21292605260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064630272 (or 1064630270 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 21292605260 in words is "twenty-one billion, two hundred ninety-two million, six hundred five thousand, two hundred sixty".