19674919957 has 16 divisors (see below), whose sum is σ = 25820812800. Its totient is φ = 14524205040.

The previous prime is 19674919951. The next prime is 19674919967. The reversal of 19674919957 is 75991947691.

It is a cyclic number.

It is not a de Polignac number, because 19674919957 - 2²³ = 19666531349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19674919892 and 19674919901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19674919951) 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, 6722707 + ... + 6725632.

It is an arithmetic number, because the mean of its divisors is an integer number (1613800800).

Almost surely, 2^19674919957 is an apocalyptic number.

It is an amenable number.

19674919957 is a deficient number, since it is larger than the sum of its proper divisors (6145892843).

19674919957 is a wasteful number, since it uses less digits than its factorization.

19674919957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13448376.

The product of its digits is 38578680, while the sum is 67.

The spelling of 19674919957 in words is "nineteen billion, six hundred seventy-four million, nine hundred nineteen thousand, nine hundred fifty-seven".