20899677116940 has 48 divisors (see below), whose sum is σ = 61063404450048. Its totient is φ = 5330932133824.

The previous prime is 20899677116939. The next prime is 20899677116947. The reversal of 20899677116940 is 4961177699802.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (20899677116947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7572345402 + ... + 7572348161.

It is an arithmetic number, because the mean of its divisors is an integer number (1272154259376).

Almost surely, 2^{20899677116940} is an apocalyptic number.

20899677116940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20899677116940 is an abundant number, since it is smaller than the sum of its proper divisors (40163727333108).

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

20899677116940 is a wasteful number, since it uses less digits than its factorization.

20899677116940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15144693598 (or 15144693596 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 69.

The spelling of 20899677116940 in words is "twenty trillion, eight hundred ninety-nine billion, six hundred seventy-seven million, one hundred sixteen thousand, nine hundred forty".