21269374 has 16 divisors (see below), whose sum is σ = 36538848. Its totient is φ = 9096192.

The previous prime is 21269359. The next prime is 21269401. The reversal of 21269374 is 47396212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6762 + ... + 9394.

It is an arithmetic number, because the mean of its divisors is an integer number (2283678).

Almost surely, 2^21269374 is an apocalyptic number.

21269374 is a deficient number, since it is larger than the sum of its proper divisors (15269474).

21269374 is a wasteful number, since it uses less digits than its factorization.

21269374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219.

The product of its digits is 18144, while the sum is 34.

The square root of 21269374 is about 4611.8731552375. The cubic root of 21269374 is about 277.0670640054.

The spelling of 21269374 in words is "twenty-one million, two hundred sixty-nine thousand, three hundred seventy-four".