21760804 has 24 divisors (see below), whose sum is σ = 41404608. Its totient is φ = 9947040.

The previous prime is 21760801. The next prime is 21760807. The reversal of 21760804 is 40806712.

It is an interprime number because it is at equal distance from previous prime (21760801) and next prime (21760807).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21760801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3609 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (1725192).

Almost surely, 2^21760804 is an apocalyptic number.

It is an amenable number.

21760804 is a deficient number, since it is larger than the sum of its proper divisors (19643804).

21760804 is a wasteful number, since it uses less digits than its factorization.

21760804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035 (or 4033 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 21760804 is about 4664.8476931193. The cubic root of 21760804 is about 279.1847202799.

The spelling of 21760804 in words is "twenty-one million, seven hundred sixty thousand, eight hundred four".