21932055 has 24 divisors (see below), whose sum is σ = 38282400. Its totient is φ = 11615040.

The previous prime is 21932051. The next prime is 21932063. The reversal of 21932055 is 55023912.

It is not a de Polignac number, because 21932055 - 2² = 21932051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21932051) 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, 5070 + ... + 8340.

It is an arithmetic number, because the mean of its divisors is an integer number (1595100).

Almost surely, 2^21932055 is an apocalyptic number.

21932055 is a deficient number, since it is larger than the sum of its proper divisors (16350345).

21932055 is a wasteful number, since it uses less digits than its factorization.

21932055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3431 (or 3428 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 21932055 is about 4683.1671975278. The cubic root of 21932055 is about 279.9151741346.

Adding to 21932055 its reverse (55023912), we get a palindrome (76955967).

The spelling of 21932055 in words is "twenty-one million, nine hundred thirty-two thousand, fifty-five".