21374804 has 24 divisors (see below), whose sum is σ = 40934208. Its totient is φ = 9685440.

The previous prime is 21374803. The next prime is 21374807. The reversal of 21374804 is 40847312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19577 + ... + 20639.

It is an arithmetic number, because the mean of its divisors is an integer number (1705592).

Almost surely, 2^21374804 is an apocalyptic number.

It is an amenable number.

21374804 is a deficient number, since it is larger than the sum of its proper divisors (19559404).

21374804 is a wasteful number, since it uses less digits than its factorization.

21374804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 21374804 is about 4623.2893052458. The cubic root of 21374804 is about 277.5241068796.

The spelling of 21374804 in words is "twenty-one million, three hundred seventy-four thousand, eight hundred four".