19957000995 has 64 divisors (see below), whose sum is σ = 37702938240. Its totient is φ = 9981149184.

The previous prime is 19957000981. The next prime is 19957000997. The reversal of 19957000995 is 59900075991.

It is not a de Polignac number, because 19957000995 - 2⁷ = 19957000867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19957000997) 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 63 ways as a sum of consecutive naturals, for example, 620019 + ... + 651411.

It is an arithmetic number, because the mean of its divisors is an integer number (589108410).

Almost surely, 2^19957000995 is an apocalyptic number.

19957000995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19957000995 is the 70635-th decagonal number.

19957000995 is a deficient number, since it is larger than the sum of its proper divisors (17745937245).

19957000995 is a wasteful number, since it uses less digits than its factorization.

19957000995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31701 (or 31695 counting only the distinct ones).

The product of its (nonzero) digits is 1148175, while the sum is 54.

The spelling of 19957000995 in words is "nineteen billion, nine hundred fifty-seven million, nine hundred ninety-five", and thus it is an aban number.