18070138 has 8 divisors (see below), whose sum is σ = 27616788. Its totient is φ = 8864544.

The previous prime is 18070123. The next prime is 18070141. The reversal of 18070138 is 83107081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14768649 + 3301489 = 3843^2 + 1817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85131 + ... + 85342.

Almost surely, 2^18070138 is an apocalyptic number.

18070138 is a deficient number, since it is larger than the sum of its proper divisors (9546650).

18070138 is a wasteful number, since it uses less digits than its factorization.

18070138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170528.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18070138 is about 4250.8984932600. The cubic root of 18070138 is about 262.4140937335.

The spelling of 18070138 in words is "eighteen million, seventy thousand, one hundred thirty-eight".