18070904 has 8 divisors (see below), whose sum is σ = 33882960. Its totient is φ = 9035448.

The previous prime is 18070891. The next prime is 18070963. The reversal of 18070904 is 40907081.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1129424 + ... + 1129439.

It is an arithmetic number, because the mean of its divisors is an integer number (4235370).

Almost surely, 2^18070904 is an apocalyptic number.

It is an amenable number.

18070904 is a deficient number, since it is larger than the sum of its proper divisors (15812056).

18070904 is a wasteful number, since it uses less digits than its factorization.

18070904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258869 (or 2258865 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18070904 is about 4250.9885909045. The cubic root of 18070904 is about 262.4178016254.

Adding to 18070904 its reverse (40907081), we get a palindrome (58977985).

The spelling of 18070904 in words is "eighteen million, seventy thousand, nine hundred four".