20102021099964 has 18 divisors (see below), whose sum is σ = 50813442225000. Its totient is φ = 6700673699976.

The previous prime is 20102021099903. The next prime is 20102021100011. The reversal of 20102021099964 is 46999012020102.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 279194737464 + ... + 279194737535.

It is an arithmetic number, because the mean of its divisors is an integer number (2822969012500).

Almost surely, 2^{20102021099964} is an apocalyptic number.

It is an amenable number.

20102021099964 is an abundant number, since it is smaller than the sum of its proper divisors (30711421125036).

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

20102021099964 is a wasteful number, since it uses less digits than its factorization.

20102021099964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558389475009 (or 558389475004 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 20102021099964 in words is "twenty trillion, one hundred two billion, twenty-one million, ninety-nine thousand, nine hundred sixty-four".