18734207428 has 6 divisors (see below), whose sum is σ = 32784863006. Its totient is φ = 9367103712.

The previous prime is 18734207419. The next prime is 18734207431. The reversal of 18734207428 is 82470243781.

It can be written as a sum of positive squares in only one way, i.e., 15170356224 + 3563851204 = 123168^2 + 59698^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2341775925 + ... + 2341775932.

Almost surely, 2^18734207428 is an apocalyptic number.

It is an amenable number.

18734207428 is a deficient number, since it is larger than the sum of its proper divisors (14050655578).

18734207428 is a wasteful number, since it uses less digits than its factorization.

18734207428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4683551861 (or 4683551859 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 46.

The spelling of 18734207428 in words is "eighteen billion, seven hundred thirty-four million, two hundred seven thousand, four hundred twenty-eight".