19975980694 has 16 divisors (see below), whose sum is σ = 30942656640. Its totient is φ = 9662014080.

The previous prime is 19975980671. The next prime is 19975980697. The reversal of 19975980694 is 49608957991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19975980697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100012 + ... + 223504.

It is an arithmetic number, because the mean of its divisors is an integer number (1933916040).

Almost surely, 2^19975980694 is an apocalyptic number.

19975980694 is a deficient number, since it is larger than the sum of its proper divisors (10966675946).

19975980694 is a wasteful number, since it uses less digits than its factorization.

19975980694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126135.

The product of its (nonzero) digits is 44089920, while the sum is 67.

The spelling of 19975980694 in words is "nineteen billion, nine hundred seventy-five million, nine hundred eighty thousand, six hundred ninety-four".