20988557132907 has 64 divisors (see below), whose sum is σ = 35223589416960. Its totient is φ = 10820549458944.

The previous prime is 20988557132903. The next prime is 20988557132989. The reversal of 20988557132907 is 70923175588902.

It is not a de Polignac number, because 20988557132907 - 2² = 20988557132903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20988557132903) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8289319 + ... + 10520927.

It is an arithmetic number, because the mean of its divisors is an integer number (550368584640).

Almost surely, 2^{20988557132907} is an apocalyptic number.

20988557132907 is a deficient number, since it is larger than the sum of its proper divisors (14235032284053).

20988557132907 is a wasteful number, since it uses less digits than its factorization.

20988557132907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232412.

The product of its (nonzero) digits is 76204800, while the sum is 66.

The spelling of 20988557132907 in words is "twenty trillion, nine hundred eighty-eight billion, five hundred fifty-seven million, one hundred thirty-two thousand, nine hundred seven".