21048464 has 20 divisors (see below), whose sum is σ = 40853040. Its totient is φ = 10505760.

The previous prime is 21048451. The next prime is 21048479. The reversal of 21048464 is 46484012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15659 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (2042652).

Almost surely, 2^21048464 is an apocalyptic number.

It is an amenable number.

21048464 is a deficient number, since it is larger than the sum of its proper divisors (19804576).

21048464 is a wasteful number, since it uses less digits than its factorization.

21048464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 21048464 is about 4587.8605035463. The cubic root of 21048464 is about 276.1044902969.

It can be divided in two parts, 21048 and 464, that added together give a palindrome (21512).

The spelling of 21048464 in words is "twenty-one million, forty-eight thousand, four hundred sixty-four".