19243671551 has 6 divisors (see below), whose sum is σ = 20837822040. Its totient is φ = 17763388968.

The previous prime is 19243671511. The next prime is 19243671583. The reversal of 19243671551 is 15517634291.

It is a de Polignac number, because none of the positive numbers 2^k-19243671551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19243671511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56933771 + ... + 56934108.

It is an arithmetic number, because the mean of its divisors is an integer number (3472970340).

Almost surely, 2^19243671551 is an apocalyptic number.

19243671551 is a deficient number, since it is larger than the sum of its proper divisors (1594150489).

19243671551 is a wasteful number, since it uses less digits than its factorization.

19243671551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113867905 (or 113867892 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The spelling of 19243671551 in words is "nineteen billion, two hundred forty-three million, six hundred seventy-one thousand, five hundred fifty-one".