213408018 has 12 divisors (see below), whose sum is σ = 462384078. Its totient is φ = 71136000.

The previous prime is 213408001. The next prime is 213408029. The reversal of 213408018 is 810804312.

It can be written as a sum of positive squares in only one way, i.e., 187060329 + 26347689 = 13677^2 + 5133^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 213407982 and 213408000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5927983 + ... + 5928018.

Almost surely, 2^213408018 is an apocalyptic number.

213408018 is an abundant number, since it is smaller than the sum of its proper divisors (248976060).

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

213408018 is a wasteful number, since it uses less digits than its factorization.

213408018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11856009 (or 11856006 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 213408018 is about 14608.4912978719. The cubic root of 213408018 is about 597.5903522848.

The spelling of 213408018 in words is "two hundred thirteen million, four hundred eight thousand, eighteen".