21973052 has 24 divisors (see below), whose sum is σ = 39344256. Its totient is φ = 10734768.

The previous prime is 21973051. The next prime is 21973069. The reversal of 21973052 is 25037912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21973051) 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, 43433 + ... + 43935.

It is an arithmetic number, because the mean of its divisors is an integer number (1639344).

Almost surely, 2^21973052 is an apocalyptic number.

It is an amenable number.

21973052 is a deficient number, since it is larger than the sum of its proper divisors (17371204).

21973052 is a wasteful number, since it uses less digits than its factorization.

21973052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 21973052 is about 4687.5422131433. The cubic root of 21973052 is about 280.0894782056.

The spelling of 21973052 in words is "twenty-one million, nine hundred seventy-three thousand, fifty-two".