21872676 has 96 divisors (see below), whose sum is σ = 63141120. Its totient is φ = 5770752.

The previous prime is 21872663. The next prime is 21872689. The reversal of 21872676 is 67627812.

It is an interprime number because it is at equal distance from previous prime (21872663) and next prime (21872689).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412666 + ... + 412718.

It is an arithmetic number, because the mean of its divisors is an integer number (657720).

Almost surely, 2^21872676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21872676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31570560).

21872676 is an abundant number, since it is smaller than the sum of its proper divisors (41268444).

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

21872676 is a wasteful number, since it uses less digits than its factorization.

21872676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 82 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 21872676 is about 4676.8232808179. The cubic root of 21872676 is about 279.6623310435.

The spelling of 21872676 in words is "twenty-one million, eight hundred seventy-two thousand, six hundred seventy-six".