19718342936 has 16 divisors (see below), whose sum is σ = 36984940200. Its totient is φ = 9855692224.

The previous prime is 19718342921. The next prime is 19718342981. The reversal of 19718342936 is 63924381791.

It is a super-2 number, since 2×19718342936² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410741 + ... + 456228.

Almost surely, 2^19718342936 is an apocalyptic number.

It is an amenable number.

19718342936 is a deficient number, since it is larger than the sum of its proper divisors (17266597264).

19718342936 is a wasteful number, since it uses less digits than its factorization.

19718342936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869818 (or 869814 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The spelling of 19718342936 in words is "nineteen billion, seven hundred eighteen million, three hundred forty-two thousand, nine hundred thirty-six".