21869058 has 32 divisors (see below), whose sum is σ = 44870400. Its totient is φ = 7103376.

The previous prime is 21869051. The next prime is 21869059. The reversal of 21869058 is 85096812.

It is not an unprimeable number, because it can be changed into a prime (21869051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57513 + ... + 57891.

It is an arithmetic number, because the mean of its divisors is an integer number (1402200).

Almost surely, 2^21869058 is an apocalyptic number.

21869058 is an abundant number, since it is smaller than the sum of its proper divisors (23001342).

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

21869058 is a wasteful number, since it uses less digits than its factorization.

21869058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 21869058 is about 4676.4364638045. The cubic root of 21869058 is about 279.6469103712.

The spelling of 21869058 in words is "twenty-one million, eight hundred sixty-nine thousand, fifty-eight".