21425882 has 24 divisors (see below), whose sum is σ = 35955840. Its totient is φ = 9547200.

The previous prime is 21425881. The next prime is 21425893. The reversal of 21425882 is 28852412.

It is not an unprimeable number, because it can be changed into a prime (21425881) 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, 10007 + ... + 11957.

It is an arithmetic number, because the mean of its divisors is an integer number (1498160).

Almost surely, 2^21425882 is an apocalyptic number.

21425882 is a deficient number, since it is larger than the sum of its proper divisors (14529958).

21425882 is a wasteful number, since it uses less digits than its factorization.

21425882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1989 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 21425882 is about 4628.8099982609. The cubic root of 21425882 is about 277.7449915556.

The spelling of 21425882 in words is "twenty-one million, four hundred twenty-five thousand, eight hundred eighty-two".