18867970 has 32 divisors (see below), whose sum is σ = 37920960. Its totient is φ = 6699840.

The previous prime is 18867967. The next prime is 18867973. The reversal of 18867970 is 7976881.

It is an interprime number because it is at equal distance from previous prime (18867967) and next prime (18867973).

It is a self number, because there is not a number n which added to its sum of digits gives 18867970.

It is not an unprimeable number, because it can be changed into a prime (18867973) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2736 + ... + 6724.

It is an arithmetic number, because the mean of its divisors is an integer number (1185030).

Almost surely, 2^18867970 is an apocalyptic number.

18867970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18867970 is an abundant number, since it is smaller than the sum of its proper divisors (19052990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18867970 is a wasteful number, since it uses less digits than its factorization.

18867970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 18867970 is about 4343.7276618131. The cubic root of 18867970 is about 266.2206415497.

The spelling of 18867970 in words is "eighteen million, eight hundred sixty-seven thousand, nine hundred seventy".