18257370706 has 4 divisors (see below), whose sum is σ = 27386056062. Its totient is φ = 9128685352.

The previous prime is 18257370689. The next prime is 18257370709. The reversal of 18257370706 is 60707375281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17413177681 + 844193025 = 131959^2 + 29055^2 .

It is a super-4 number, since 4×18257370706⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18257370709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564342675 + ... + 4564342678.

Almost surely, 2^18257370706 is an apocalyptic number.

18257370706 is a deficient number, since it is larger than the sum of its proper divisors (9128685356).

18257370706 is an equidigital number, since it uses as much as digits as its factorization.

18257370706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128685355.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 18257370706 in words is "eighteen billion, two hundred fifty-seven million, three hundred seventy thousand, seven hundred six".