21862484 has 12 divisors (see below), whose sum is σ = 43725024. Its totient is φ = 9369624.

The previous prime is 21862481. The next prime is 21862499. The reversal of 21862484 is 48426812.

21862484 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21862481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390374 + ... + 390429.

It is an arithmetic number, because the mean of its divisors is an integer number (3643752).

Almost surely, 2^21862484 is an apocalyptic number.

It is an amenable number.

21862484 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21862484 is a wasteful number, since it uses less digits than its factorization.

21862484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780814 (or 780812 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 21862484 is about 4675.7335253412. The cubic root of 21862484 is about 279.6188862555.

The spelling of 21862484 in words is "twenty-one million, eight hundred sixty-two thousand, four hundred eighty-four".