21350643606260 has 24 divisors (see below), whose sum is σ = 47196159551520. Its totient is φ = 8090770208544.

The previous prime is 21350643606163. The next prime is 21350643606283. The reversal of 21350643606260 is 6260634605312.

It is a super-2 number, since 2×21350643606260² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28092951734 + ... + 28092952493.

It is an arithmetic number, because the mean of its divisors is an integer number (1966506647980).

Almost surely, 2^{21350643606260} is an apocalyptic number.

21350643606260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21350643606260 is an abundant number, since it is smaller than the sum of its proper divisors (25845515945260).

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

21350643606260 is a wasteful number, since it uses less digits than its factorization.

21350643606260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56185904255 (or 56185904253 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 21350643606260 in words is "twenty-one trillion, three hundred fifty billion, six hundred forty-three million, six hundred six thousand, two hundred sixty".