21374416 has 20 divisors (see below), whose sum is σ = 47329312. Its totient is φ = 9160416.

The previous prime is 21374399. The next prime is 21374443. The reversal of 21374416 is 61447312.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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, 95310 + ... + 95533.

Almost surely, 2^21374416 is an apocalyptic number.

It is an amenable number.

21374416 is an abundant number, since it is smaller than the sum of its proper divisors (25954896).

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

21374416 is a wasteful number, since it uses less digits than its factorization.

21374416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190858 (or 190852 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 21374416 is about 4623.2473435887. The cubic root of 21374416 is about 277.5224276438.

The spelling of 21374416 in words is "twenty-one million, three hundred seventy-four thousand, four hundred sixteen".