21362774 has 8 divisors (see below), whose sum is σ = 32073888. Its totient is φ = 10671480.

The previous prime is 21362753. The next prime is 21362827. The reversal of 21362774 is 47726312.

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

It is a super-2 number, since 2×21362774² = 912736225950152, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21362774.

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 3 ways as a sum of consecutive naturals, for example, 1877 + ... + 6800.

It is an arithmetic number, because the mean of its divisors is an integer number (4009236).

Almost surely, 2^21362774 is an apocalyptic number.

21362774 is a deficient number, since it is larger than the sum of its proper divisors (10711114).

21362774 is a wasteful number, since it uses less digits than its factorization.

21362774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910.

The product of its digits is 14112, while the sum is 32.

The square root of 21362774 is about 4621.9881003741. The cubic root of 21362774 is about 277.4720324599.

The spelling of 21362774 in words is "twenty-one million, three hundred sixty-two thousand, seven hundred seventy-four".