19790680408 has 8 divisors (see below), whose sum is σ = 37107525780. Its totient is φ = 9895340200.

The previous prime is 19790680397. The next prime is 19790680423. The reversal of 19790680408 is 80408609791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1236917518 + ... + 1236917533.

Almost surely, 2^19790680408 is an apocalyptic number.

It is an amenable number.

19790680408 is a deficient number, since it is larger than the sum of its proper divisors (17316845372).

19790680408 is a wasteful number, since it uses less digits than its factorization.

19790680408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473835057 (or 2473835053 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 19790680408 in words is "nineteen billion, seven hundred ninety million, six hundred eighty thousand, four hundred eight".