21464612 has 48 divisors (see below), whose sum is σ = 42844032. Its totient is φ = 9335040.

The previous prime is 21464603. The next prime is 21464627. The reversal of 21464612 is 21646412.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156608 + ... + 156744.

It is an arithmetic number, because the mean of its divisors is an integer number (892584).

Almost surely, 2^21464612 is an apocalyptic number.

It is an amenable number.

21464612 is a deficient number, since it is larger than the sum of its proper divisors (21379420).

21464612 is a wasteful number, since it uses less digits than its factorization.

21464612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 21464612 is about 4632.9916900422. The cubic root of 21464612 is about 277.9122439226.

It can be divided in two parts, 214646 and 12, that multiplied together give a palindrome (2575752).

The spelling of 21464612 in words is "twenty-one million, four hundred sixty-four thousand, six hundred twelve".