18870470 has 16 divisors (see below), whose sum is σ = 34194528. Its totient is φ = 7497600.

The previous prime is 18870469. The next prime is 18870479. The reversal of 18870470 is 7407881.

It is a self number, because there is not a number n which added to its sum of digits gives 18870470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870479) 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, 4739 + ... + 7758.

It is an arithmetic number, because the mean of its divisors is an integer number (2137158).

Almost surely, 2^18870470 is an apocalyptic number.

18870470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18870470 is a deficient number, since it is larger than the sum of its proper divisors (15324058).

18870470 is a wasteful number, since it uses less digits than its factorization.

18870470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12655.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 18870470 is about 4344.0154235454. The cubic root of 18870470 is about 266.2323990804.

The spelling of 18870470 in words is "eighteen million, eight hundred seventy thousand, four hundred seventy".