21356205660130 has 32 divisors (see below), whose sum is σ = 42069802353408. Its totient is φ = 7741081795200.

The previous prime is 21356205660109. The next prime is 21356205660133. The reversal of 21356205660130 is 3106650265312.

It is not an unprimeable number, because it can be changed into a prime (21356205660133) 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, 310105066 + ... + 310173925.

It is an arithmetic number, because the mean of its divisors is an integer number (1314681323544).

Almost surely, 2^{21356205660130} is an apocalyptic number.

21356205660130 is a deficient number, since it is larger than the sum of its proper divisors (20713596693278).

21356205660130 is a wasteful number, since it uses less digits than its factorization.

21356205660130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620279322.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 21356205660130 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred five million, six hundred sixty thousand, one hundred thirty".