21146532164620 has 24 divisors (see below), whose sum is σ = 46338487874784. Its totient is φ = 8090847088896.

The previous prime is 21146532164609. The next prime is 21146532164633. The reversal of 21146532164620 is 2646123564112.

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, 22985360589 + ... + 22985361508.

It is an arithmetic number, because the mean of its divisors is an integer number (1930770328116).

Almost surely, 2^{21146532164620} is an apocalyptic number.

21146532164620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21146532164620 is an abundant number, since it is smaller than the sum of its proper divisors (25191955710164).

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

21146532164620 is a wasteful number, since it uses less digits than its factorization.

21146532164620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45970722129 (or 45970722127 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 21146532164620 in words is "twenty-one trillion, one hundred forty-six billion, five hundred thirty-two million, one hundred sixty-four thousand, six hundred twenty".