18516970 has 16 divisors (see below), whose sum is σ = 33382368. Its totient is φ = 7395280.

The previous prime is 18516947. The next prime is 18516989. The reversal of 18516970 is 7961581.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8757 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (2086398).

Almost surely, 2^18516970 is an apocalyptic number.

18516970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18516970 is a deficient number, since it is larger than the sum of its proper divisors (14865398).

18516970 is a wasteful number, since it uses less digits than its factorization.

18516970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 18516970 is about 4303.1349037649. The cubic root of 18516970 is about 264.5594674294.

The spelling of 18516970 in words is "eighteen million, five hundred sixteen thousand, nine hundred seventy".