21893055 has 8 divisors (see below), whose sum is σ = 35028912. Its totient is φ = 11676288.

The previous prime is 21893051. The next prime is 21893077. The reversal of 21893055 is 55039812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21893055 - 2² = 21893051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21893051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729754 + ... + 729783.

It is an arithmetic number, because the mean of its divisors is an integer number (4378614).

Almost surely, 2^21893055 is an apocalyptic number.

21893055 is a deficient number, since it is larger than the sum of its proper divisors (13135857).

21893055 is a wasteful number, since it uses less digits than its factorization.

21893055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459545.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 21893055 is about 4679.0014960459. The cubic root of 21893055 is about 279.7491588516.

The spelling of 21893055 in words is "twenty-one million, eight hundred ninety-three thousand, fifty-five".