21814794 has 12 divisors (see below), whose sum is σ = 47265426. Its totient is φ = 7271592.

The previous prime is 21814777. The next prime is 21814811. The reversal of 21814794 is 49741812.

21814794 is a `hidden beast` number, since 2 + 181 + 479 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (21814777) and next prime (21814811).

It can be written as a sum of positive squares in only one way, i.e., 14861025 + 6953769 = 3855^2 + 2637^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605949 + ... + 605984.

Almost surely, 2^21814794 is an apocalyptic number.

21814794 is an abundant number, since it is smaller than the sum of its proper divisors (25450632).

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

21814794 is a wasteful number, since it uses less digits than its factorization.

21814794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211941 (or 1211938 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 21814794 is about 4670.6310066200. The cubic root of 21814794 is about 279.4154215345.

The spelling of 21814794 in words is "twenty-one million, eight hundred fourteen thousand, seven hundred ninety-four".