21146229760164 has 24 divisors (see below), whose sum is σ = 49362571917120. Its totient is φ = 7045690518624.

The previous prime is 21146229760109. The next prime is 21146229760181. The reversal of 21146229760164 is 46106792264112.

It is a super-2 number, since 2×21146229760164² (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 7 ways as a sum of consecutive naturals, for example, 381562984 + ... + 381618399.

It is an arithmetic number, because the mean of its divisors is an integer number (2056773829880).

Almost surely, 2^{21146229760164} is an apocalyptic number.

It is an amenable number.

21146229760164 is an abundant number, since it is smaller than the sum of its proper divisors (28216342156956).

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

21146229760164 is a wasteful number, since it uses less digits than its factorization.

21146229760164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763183699 (or 763183697 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 21146229760164 in words is "twenty-one trillion, one hundred forty-six billion, two hundred twenty-nine million, seven hundred sixty thousand, one hundred sixty-four".