21374204 has 6 divisors (see below), whose sum is σ = 37404864. Its totient is φ = 10687100.

The previous prime is 21374203. The next prime is 21374209. The reversal of 21374204 is 40247312.

It is a self number, because there is not a number n which added to its sum of digits gives 21374204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2671772 + ... + 2671779.

It is an arithmetic number, because the mean of its divisors is an integer number (6234144).

Almost surely, 2^21374204 is an apocalyptic number.

It is an amenable number.

21374204 is a deficient number, since it is larger than the sum of its proper divisors (16030660).

21374204 is a wasteful number, since it uses less digits than its factorization.

21374204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343555 (or 5343553 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 21374204 is about 4623.2244159245. The cubic root of 21374204 is about 277.5215101147.

The spelling of 21374204 in words is "twenty-one million, three hundred seventy-four thousand, two hundred four".