21882573 has 12 divisors (see below), whose sum is σ = 31750368. Its totient is φ = 14522760.

The previous prime is 21882557. The next prime is 21882593. The reversal of 21882573 is 37528812.

21882573 is a `hidden beast` number, since 2 + 1 + 8 + 82 + 573 = 666.

It is not a de Polignac number, because 21882573 - 2⁴ = 21882557 is a prime.

It is a super-2 number, since 2×21882573² = 957694002200658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21882593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3313 + ... + 7398.

It is an arithmetic number, because the mean of its divisors is an integer number (2645864).

Almost surely, 2^21882573 is an apocalyptic number.

It is an amenable number.

21882573 is a deficient number, since it is larger than the sum of its proper divisors (9867795).

21882573 is a wasteful number, since it uses less digits than its factorization.

21882573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944 (or 10941 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 21882573 is about 4677.8812511649. The cubic root of 21882573 is about 279.7045054400.

It can be divided in two parts, 2188 and 2573, that added together give a square (4761 = 69²).

The spelling of 21882573 in words is "twenty-one million, eight hundred eighty-two thousand, five hundred seventy-three".