18827970 has 32 divisors (see below), whose sum is σ = 51643008. Its totient is φ = 4303488.

The previous prime is 18827957. The next prime is 18827971. The reversal of 18827970 is 7972881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18827971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44619 + ... + 45038.

It is an arithmetic number, because the mean of its divisors is an integer number (1613844).

Almost surely, 2^18827970 is an apocalyptic number.

18827970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18827970 is an abundant number, since it is smaller than the sum of its proper divisors (32815038).

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

18827970 is a wasteful number, since it uses less digits than its factorization.

18827970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89674.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 18827970 is about 4339.1208787034. The cubic root of 18827970 is about 266.0323796489.

The spelling of 18827970 in words is "eighteen million, eight hundred twenty-seven thousand, nine hundred seventy".