18100072 has 16 divisors (see below), whose sum is σ = 34090560. Its totient is φ = 9009264.

The previous prime is 18100039. The next prime is 18100081. The reversal of 18100072 is 27000181.

It is a super-2 number, since 2×18100072² = 655225212810368, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3168 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (2130660).

Almost surely, 2^18100072 is an apocalyptic number.

It is an amenable number.

18100072 is a deficient number, since it is larger than the sum of its proper divisors (15990488).

18100072 is a wasteful number, since it uses less digits than its factorization.

18100072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200 (or 10196 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 18100072 is about 4254.4179390370. The cubic root of 18100072 is about 262.5589140631.

The spelling of 18100072 in words is "eighteen million, one hundred thousand, seventy-two".