19930036936 has 8 divisors (see below), whose sum is σ = 37368819270. Its totient is φ = 9965018464.

The previous prime is 19930036897. The next prime is 19930036961. The reversal of 19930036936 is 63963003991.

It can be written as a sum of positive squares in only one way, i.e., 18932108836 + 997928100 = 137594^2 + 31590^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 19930036936.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245627301 + ... + 1245627316.

Almost surely, 2^19930036936 is an apocalyptic number.

It is an amenable number.

19930036936 is a deficient number, since it is larger than the sum of its proper divisors (17438782334).

19930036936 is a wasteful number, since it uses less digits than its factorization.

19930036936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491254623 (or 2491254619 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 49.

The spelling of 19930036936 in words is "nineteen billion, nine hundred thirty million, thirty-six thousand, nine hundred thirty-six".