18868870 has 8 divisors (see below), whose sum is σ = 33963984. Its totient is φ = 7547544.

The previous prime is 18868867. The next prime is 18868877. The reversal of 18868870 is 7886881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18868870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18868877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943434 + ... + 943453.

It is an arithmetic number, because the mean of its divisors is an integer number (4245498).

Almost surely, 2^18868870 is an apocalyptic number.

18868870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18868870 is a deficient number, since it is larger than the sum of its proper divisors (15095114).

18868870 is a wasteful number, since it uses less digits than its factorization.

18868870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886894.

The product of its (nonzero) digits is 172032, while the sum is 46.

The square root of 18868870 is about 4343.8312582328. The cubic root of 18868870 is about 266.2248743804.

The spelling of 18868870 in words is "eighteen million, eight hundred sixty-eight thousand, eight hundred seventy".