21150165022460 has 24 divisors (see below), whose sum is σ = 44418421093200. Its totient is φ = 8459480381184.

The previous prime is 21150165022433. The next prime is 21150165022529. The reversal of 21150165022460 is 6422056105112.

It is a self number, because there is not a number n which added to its sum of digits gives 21150165022460.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36305534 + ... + 36883493.

It is an arithmetic number, because the mean of its divisors is an integer number (1850767545550).

Almost surely, 2^{21150165022460} is an apocalyptic number.

21150165022460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21150165022460 is an abundant number, since it is smaller than the sum of its proper divisors (23268256070740).

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

21150165022460 is a wasteful number, since it uses less digits than its factorization.

21150165022460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73203485 (or 73203483 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 21150165022460 in words is "twenty-one trillion, one hundred fifty billion, one hundred sixty-five million, twenty-two thousand, four hundred sixty".