21314378 has 8 divisors (see below), whose sum is σ = 31993920. Its totient is φ = 10649740.

The previous prime is 21314357. The next prime is 21314387. The reversal of 21314378 is 87341312.

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 21314378.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1103 + ... + 6621.

It is an arithmetic number, because the mean of its divisors is an integer number (3999240).

Almost surely, 2^21314378 is an apocalyptic number.

21314378 is a deficient number, since it is larger than the sum of its proper divisors (10679542).

21314378 is a wasteful number, since it uses less digits than its factorization.

21314378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452.

The product of its digits is 4032, while the sum is 29.

The square root of 21314378 is about 4616.7497224779. The cubic root of 21314378 is about 277.2623423114.

The spelling of 21314378 in words is "twenty-one million, three hundred fourteen thousand, three hundred seventy-eight".