21466979499960 has 96 divisors (see below), whose sum is σ = 71252102226240. Its totient is φ = 5602729396992.

The previous prime is 21466979499941. The next prime is 21466979500033. The reversal of 21466979499960 is 6999497966412.

21466979499960 is a `hidden beast` number, since 2 + 1 + 4 + 6 + 69 + 7 + 9 + 499 + 9 + 60 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21466979499960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 634350087 + ... + 634383926.

It is an arithmetic number, because the mean of its divisors is an integer number (742209398190).

Almost surely, 2^{21466979499960} is an apocalyptic number.

21466979499960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21466979499960 is an abundant number, since it is smaller than the sum of its proper divisors (49785122726280).

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

21466979499960 is a wasteful number, since it uses less digits than its factorization.

21466979499960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268734077 (or 1268734070 counting only the distinct ones).

The product of its (nonzero) digits is 2857026816, while the sum is 81.

The spelling of 21466979499960 in words is "twenty-one trillion, four hundred sixty-six billion, nine hundred seventy-nine million, four hundred ninety-nine thousand, nine hundred sixty".