21413926 has 8 divisors (see below), whose sum is σ = 32141160. Its totient is φ = 10700208.

The previous prime is 21413891. The next prime is 21413939. The reversal of 21413926 is 62931412.

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

It is a junction number, because it is equal to n+sod(n) for n = 21413894 and 21413903.

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, 2970 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (4017645).

Almost surely, 2^21413926 is an apocalyptic number.

21413926 is a deficient number, since it is larger than the sum of its proper divisors (10727234).

21413926 is a wasteful number, since it uses less digits than its factorization.

21413926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758.

The product of its digits is 2592, while the sum is 28.

The square root of 21413926 is about 4627.5183414007. The cubic root of 21413926 is about 277.6933198285.

The spelling of 21413926 in words is "twenty-one million, four hundred thirteen thousand, nine hundred twenty-six".