21883641 has 24 divisors (see below), whose sum is σ = 33467040. Its totient is φ = 12669696.

The previous prime is 21883639. The next prime is 21883643. The reversal of 21883641 is 14638812.

It is an interprime number because it is at equal distance from previous prime (21883639) and next prime (21883643).

It is not a de Polignac number, because 21883641 - 2¹ = 21883639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21883643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7350 + ... + 9888.

It is an arithmetic number, because the mean of its divisors is an integer number (1394460).

Almost surely, 2^21883641 is an apocalyptic number.

It is an amenable number.

21883641 is a deficient number, since it is larger than the sum of its proper divisors (11583399).

21883641 is a wasteful number, since it uses less digits than its factorization.

21883641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2572 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 21883641 is about 4677.9954040166. The cubic root of 21883641 is about 279.7090557817.

The spelling of 21883641 in words is "twenty-one million, eight hundred eighty-three thousand, six hundred forty-one".