21966052 has 24 divisors (see below), whose sum is σ = 40622400. Its totient is φ = 10364256.

The previous prime is 21966019. The next prime is 21966053. The reversal of 21966052 is 25066912.

21966052 is nontrivially palindromic in base 3.

It is not an unprimeable number, because it can be changed into a prime (21966053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29193 + ... + 29935.

It is an arithmetic number, because the mean of its divisors is an integer number (1692600).

Almost surely, 2^21966052 is an apocalyptic number.

It is an amenable number.

21966052 is a deficient number, since it is larger than the sum of its proper divisors (18656348).

21966052 is a wasteful number, since it uses less digits than its factorization.

21966052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 21966052 is about 4686.7954937249. The cubic root of 21966052 is about 280.0597321544.

The spelling of 21966052 in words is "twenty-one million, nine hundred sixty-six thousand, fifty-two".