19157254804 has 24 divisors (see below), whose sum is σ = 34105532328. Its totient is φ = 9413752320.

The previous prime is 19157254771. The next prime is 19157254813. The reversal of 19157254804 is 40845275191.

It can be written as a sum of positive squares in 4 ways, for example, as 10122372100 + 9034882704 = 100610^2 + 95052^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34687 + ... + 198790.

It is an arithmetic number, because the mean of its divisors is an integer number (1421063847).

Almost surely, 2^19157254804 is an apocalyptic number.

It is an amenable number.

19157254804 is a deficient number, since it is larger than the sum of its proper divisors (14948277524).

19157254804 is a wasteful number, since it uses less digits than its factorization.

19157254804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233835 (or 233833 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 19157254804 in words is "nineteen billion, one hundred fifty-seven million, two hundred fifty-four thousand, eight hundred four".