21412886 has 24 divisors (see below), whose sum is σ = 37170840. Its totient is φ = 9218880.

The previous prime is 21412883. The next prime is 21412889. The reversal of 21412886 is 68821412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21412883) and next prime (21412889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2270 + ... + 6926.

It is an arithmetic number, because the mean of its divisors is an integer number (1548785).

Almost surely, 2^21412886 is an apocalyptic number.

21412886 is a deficient number, since it is larger than the sum of its proper divisors (15757954).

21412886 is a wasteful number, since it uses less digits than its factorization.

21412886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700 (or 4689 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 21412886 is about 4627.4059687907. The cubic root of 21412886 is about 277.6888242224.

The spelling of 21412886 in words is "twenty-one million, four hundred twelve thousand, eight hundred eighty-six".