21802952 has 8 divisors (see below), whose sum is σ = 40880550. Its totient is φ = 10901472.

The previous prime is 21802931. The next prime is 21802961. The reversal of 21802952 is 25920812.

It can be written as a sum of positive squares in only one way, i.e., 19412836 + 2390116 = 4406^2 + 1546^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1362677 + ... + 1362692.

Almost surely, 2^21802952 is an apocalyptic number.

It is an amenable number.

21802952 is a deficient number, since it is larger than the sum of its proper divisors (19077598).

21802952 is a wasteful number, since it uses less digits than its factorization.

21802952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725375 (or 2725371 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21802952 is about 4669.3631257378. The cubic root of 21802952 is about 279.3648528496.

The spelling of 21802952 in words is "twenty-one million, eight hundred two thousand, nine hundred fifty-two".