21794680 has 32 divisors (see below), whose sum is σ = 51924240. Its totient is φ = 8204800.

The previous prime is 21794671. The next prime is 21794681. The reversal of 21794680 is 8649712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21794681) by changing a digit.

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, 15346 + ... + 16705.

Almost surely, 2^21794680 is an apocalyptic number.

21794680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21794680 is an abundant number, since it is smaller than the sum of its proper divisors (30129560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21794680 is a wasteful number, since it uses less digits than its factorization.

21794680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32079 (or 32075 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 21794680 is about 4668.4772678037. The cubic root of 21794680 is about 279.3295182097.

It can be divided in two parts, 2179 and 4680, that added together give a cube (6859 = 19³).

The spelling of 21794680 in words is "twenty-one million, seven hundred ninety-four thousand, six hundred eighty".