18272478357 has 48 divisors (see below), whose sum is σ = 30709186560. Its totient is φ = 10253124000.

The previous prime is 18272478347. The next prime is 18272478359. The reversal of 18272478357 is 75387427281.

18272478357 is a `hidden beast` number, since 18 + 272 + 4 + 7 + 8 + 357 = 666.

It is not a de Polignac number, because 18272478357 - 2²² = 18268284053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18272478359) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4276132 + ... + 4280402.

It is an arithmetic number, because the mean of its divisors is an integer number (639774720).

Almost surely, 2^18272478357 is an apocalyptic number.

It is an amenable number.

18272478357 is a deficient number, since it is larger than the sum of its proper divisors (12436708203).

18272478357 is a wasteful number, since it uses less digits than its factorization.

18272478357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494 (or 5491 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The spelling of 18272478357 in words is "eighteen billion, two hundred seventy-two million, four hundred seventy-eight thousand, three hundred fifty-seven".