21350640136166 has 8 divisors (see below), whose sum is σ = 34937411131944. Its totient is φ = 9704836425520.

The previous prime is 21350640136151. The next prime is 21350640136171. The reversal of 21350640136166 is 66163104605312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21350640136166² (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 3 ways as a sum of consecutive naturals, for example, 485241821255 + ... + 485241821298.

It is an arithmetic number, because the mean of its divisors is an integer number (4367176391493).

Almost surely, 2^{21350640136166} is an apocalyptic number.

21350640136166 is a deficient number, since it is larger than the sum of its proper divisors (13586770995778).

21350640136166 is a wasteful number, since it uses less digits than its factorization.

21350640136166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970483642566.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 21350640136166 in words is "twenty-one trillion, three hundred fifty billion, six hundred forty million, one hundred thirty-six thousand, one hundred sixty-six".