21412364 has 6 divisors (see below), whose sum is σ = 37471644. Its totient is φ = 10706180.

The previous prime is 21412357. The next prime is 21412387. The reversal of 21412364 is 46321412.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2676542 + ... + 2676549.

It is an arithmetic number, because the mean of its divisors is an integer number (6245274).

Almost surely, 2^21412364 is an apocalyptic number.

It is an amenable number.

21412364 is a deficient number, since it is larger than the sum of its proper divisors (16059280).

21412364 is a wasteful number, since it uses less digits than its factorization.

21412364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5353095 (or 5353093 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 21412364 is about 4627.3495653560. The cubic root of 21412364 is about 277.6865677191.

Adding to 21412364 its reverse (46321412), we get a palindrome (67733776).

The spelling of 21412364 in words is "twenty-one million, four hundred twelve thousand, three hundred sixty-four".