18966970 has 16 divisors (see below), whose sum is σ = 37244448. Its totient is φ = 6897040.

The previous prime is 18966953. The next prime is 18966971. The reversal of 18966970 is 7966981.

It is a self number, because there is not a number n which added to its sum of digits gives 18966970.

It is not an unprimeable number, because it can be changed into a prime (18966971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86104 + ... + 86323.

It is an arithmetic number, because the mean of its divisors is an integer number (2327778).

Almost surely, 2^18966970 is an apocalyptic number.

18966970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18966970 is a deficient number, since it is larger than the sum of its proper divisors (18277478).

18966970 is a wasteful number, since it uses less digits than its factorization.

18966970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172445.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 18966970 is about 4355.1084946302. The cubic root of 18966970 is about 266.6854483299.

The spelling of 18966970 in words is "eighteen million, nine hundred sixty-six thousand, nine hundred seventy".