21930676 has 6 divisors (see below), whose sum is σ = 38378690. Its totient is φ = 10965336.

The previous prime is 21930673. The next prime is 21930679. The reversal of 21930676 is 67603912.

It is an interprime number because it is at equal distance from previous prime (21930673) and next prime (21930679).

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 1464100 = 4524^2 + 1210^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21930673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2741331 + ... + 2741338.

Almost surely, 2^21930676 is an apocalyptic number.

It is an amenable number.

21930676 is a deficient number, since it is larger than the sum of its proper divisors (16448014).

21930676 is a wasteful number, since it uses less digits than its factorization.

21930676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482673 (or 5482671 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 21930676 is about 4683.0199657913. The cubic root of 21930676 is about 279.9093073623.

The spelling of 21930676 in words is "twenty-one million, nine hundred thirty thousand, six hundred seventy-six".