19930667956 has 12 divisors (see below), whose sum is σ = 36714388480. Its totient is φ = 9440842680.

The previous prime is 19930667941. The next prime is 19930667959. The reversal of 19930667956 is 65976603991.

It is a junction number, because it is equal to n+sod(n) for n = 19930667894 and 19930667903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19930667959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131122740 + ... + 131122891.

Almost surely, 2^19930667956 is an apocalyptic number.

It is an amenable number.

19930667956 is a deficient number, since it is larger than the sum of its proper divisors (16783720524).

19930667956 is a wasteful number, since it uses less digits than its factorization.

19930667956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262245654 (or 262245652 counting only the distinct ones).

The product of its (nonzero) digits is 16533720, while the sum is 61.

The spelling of 19930667956 in words is "nineteen billion, nine hundred thirty million, six hundred sixty-seven thousand, nine hundred fifty-six".