20999892035616 has 96 divisors (see below), whose sum is σ = 59377649506560. Its totient is φ = 6460137068544.

The previous prime is 20999892035609. The next prime is 20999892035623. The reversal of 20999892035616 is 61653029899902.

It is an interprime number because it is at equal distance from previous prime (20999892035609) and next prime (20999892035623).

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4122681 + ... + 7680903.

It is an arithmetic number, because the mean of its divisors is an integer number (618517182360).

Almost surely, 2^{20999892035616} is an apocalyptic number.

20999892035616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20999892035616 is an abundant number, since it is smaller than the sum of its proper divisors (38377757470944).

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

20999892035616 is a wasteful number, since it uses less digits than its factorization.

20999892035616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562978 (or 3562970 counting only the distinct ones).

The product of its (nonzero) digits is 113374080, while the sum is 69.

The spelling of 20999892035616 in words is "twenty trillion, nine hundred ninety-nine billion, eight hundred ninety-two million, thirty-five thousand, six hundred sixteen".