19702613956 has 9 divisors (see below), whose sum is σ = 34480065711. Its totient is φ = 9851166612.

The previous prime is 19702613929. The next prime is 19702613963. The reversal of 19702613956 is 65931620791.

The square root of 19702613956 is 140366.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 245641 + ... + 315823.

Almost surely, 2^19702613956 is an apocalyptic number.

19702613956 is the 140366-th square number.

It is an amenable number.

19702613956 is a deficient number, since it is larger than the sum of its proper divisors (14777451755).

19702613956 is an frugal number, since it uses more digits than its factorization.

19702613956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140370 (or 70185 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

Multiplying 19702613956 by its sum of digits (49), we get a square (965428083844 = 982562²).

The spelling of 19702613956 in words is "nineteen billion, seven hundred two million, six hundred thirteen thousand, nine hundred fifty-six".