19020619972 has 6 divisors (see below), whose sum is σ = 33286084958. Its totient is φ = 9510309984.

The previous prime is 19020619909. The next prime is 19020619991. The reversal of 19020619972 is 27991602091.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14372652996 + 4647966976 = 119886^2 + 68176^2 .

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, 2377577493 + ... + 2377577500.

Almost surely, 2^19020619972 is an apocalyptic number.

It is an amenable number.

19020619972 is a deficient number, since it is larger than the sum of its proper divisors (14265464986).

19020619972 is a wasteful number, since it uses less digits than its factorization.

19020619972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755154997 (or 4755154995 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 19020619972 in words is "nineteen billion, twenty million, six hundred nineteen thousand, nine hundred seventy-two".