21514004 has 12 divisors (see below), whose sum is σ = 39631200. Its totient is φ = 10190808.

The previous prime is 21513979. The next prime is 21514013. The reversal of 21514004 is 40041512.

It is a super-2 number, since 2×21514004² = 925704736224032, which contains 22 as substring.

It is a congruent number.

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, 141464 + ... + 141615.

It is an arithmetic number, because the mean of its divisors is an integer number (3302600).

Almost surely, 2^21514004 is an apocalyptic number.

It is an amenable number.

21514004 is a deficient number, since it is larger than the sum of its proper divisors (18117196).

21514004 is a wasteful number, since it uses less digits than its factorization.

21514004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283102 (or 283100 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21514004 is about 4638.3190920850. The cubic root of 21514004 is about 278.1252476369.

Adding to 21514004 its reverse (40041512), we get a palindrome (61555516).

The spelling of 21514004 in words is "twenty-one million, five hundred fourteen thousand, four".