13421918 has 8 divisors (see below), whose sum is σ = 20149248. Its totient is φ = 6705504.

The previous prime is 13421917. The next prime is 13421927. The reversal of 13421918 is 81912431.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13421917) 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, 1955 + ... + 5537.

It is an arithmetic number, because the mean of its divisors is an integer number (2518656).

Almost surely, 2^13421918 is an apocalyptic number.

13421918 is a deficient number, since it is larger than the sum of its proper divisors (6727330).

13421918 is a wasteful number, since it uses less digits than its factorization.

13421918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458.

The product of its digits is 1728, while the sum is 29.

The square root of 13421918 is about 3663.5935909978. The cubic root of 13421918 is about 237.6502052607.

The spelling of 13421918 in words is "thirteen million, four hundred twenty-one thousand, nine hundred eighteen".