21412474 has 8 divisors (see below), whose sum is σ = 32364288. Its totient is φ = 10624380.

The previous prime is 21412451. The next prime is 21412493. The reversal of 21412474 is 47421412.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 40602 + ... + 41125.

It is an arithmetic number, because the mean of its divisors is an integer number (4045536).

Almost surely, 2^21412474 is an apocalyptic number.

21412474 is a deficient number, since it is larger than the sum of its proper divisors (10951814).

21412474 is a wasteful number, since it uses less digits than its factorization.

21412474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81860.

The product of its digits is 1792, while the sum is 25.

The square root of 21412474 is about 4627.3614511944. The cubic root of 21412474 is about 277.6870432305.

Adding to 21412474 its reverse (47421412), we get a palindrome (68833886).

The spelling of 21412474 in words is "twenty-one million, four hundred twelve thousand, four hundred seventy-four".