21717260557002 has 24 divisors (see below), whose sum is σ = 47290517133600. Its totient is φ = 7202709530280.

The previous prime is 21717260556967. The next prime is 21717260557019. The reversal of 21717260557002 is 20075506271712.

21717260557002 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 72 + 6 + 0 + 5 + 570 + 0 + 2 = 666.

It is a super-2 number, since 2×21717260557002² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3031439824 + ... + 3031446987.

It is an arithmetic number, because the mean of its divisors is an integer number (1970438213900).

Almost surely, 2^{21717260557002} is an apocalyptic number.

21717260557002 is an abundant number, since it is smaller than the sum of its proper divisors (25573256576598).

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

21717260557002 is a wasteful number, since it uses less digits than its factorization.

21717260557002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6062887018 (or 6062887015 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 45.

The spelling of 21717260557002 in words is "twenty-one trillion, seven hundred seventeen billion, two hundred sixty million, five hundred fifty-seven thousand, two".