21414004 has 12 divisors (see below), whose sum is σ = 38034304. Its totient is φ = 10547064.

The previous prime is 21413993. The next prime is 21414037. The reversal of 21414004 is 40041412.

It is a super-3 number, since 3×21414004³ (a number of 23 digits) contains 333 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, 39684 + ... + 40219.

Almost surely, 2^21414004 is an apocalyptic number.

It is an amenable number.

21414004 is a deficient number, since it is larger than the sum of its proper divisors (16620300).

21414004 is a wasteful number, since it uses less digits than its factorization.

21414004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79974 (or 79972 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21414004 is about 4627.5267692365. The cubic root of 21414004 is about 277.6936569931.

Adding to 21414004 its reverse (40041412), we get a palindrome (61455416).

The spelling of 21414004 in words is "twenty-one million, four hundred fourteen thousand, four".