19990597076 has 6 divisors (see below), whose sum is σ = 34983544890. Its totient is φ = 9995298536.

The previous prime is 19990597073. The next prime is 19990597087. The reversal of 19990597076 is 67079509991.

It can be written as a sum of positive squares in only one way, i.e., 18789281476 + 1201315600 = 137074^2 + 34660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19990597073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2498824631 + ... + 2498824638.

It is an arithmetic number, because the mean of its divisors is an integer number (5830590815).

Almost surely, 2^19990597076 is an apocalyptic number.

It is an amenable number.

19990597076 is a deficient number, since it is larger than the sum of its proper divisors (14992947814).

19990597076 is a wasteful number, since it uses less digits than its factorization.

19990597076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997649273 (or 4997649271 counting only the distinct ones).

The product of its (nonzero) digits is 9644670, while the sum is 62.

The spelling of 19990597076 in words is "nineteen billion, nine hundred ninety million, five hundred ninety-seven thousand, seventy-six".