21614406 has 16 divisors (see below), whose sum is σ = 47158848. Its totient is φ = 6549800.

The previous prime is 21614399. The next prime is 21614431. The reversal of 21614406 is 60441612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163680 + ... + 163811.

It is an arithmetic number, because the mean of its divisors is an integer number (2947428).

Almost surely, 2^21614406 is an apocalyptic number.

21614406 is an abundant number, since it is smaller than the sum of its proper divisors (25544442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21614406 is a wasteful number, since it uses less digits than its factorization.

21614406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327507.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 21614406 is about 4649.1295959566. The cubic root of 21614406 is about 278.5572298953.

It can be divided in two parts, 216 and 14406, that multiplied together give a 4-th power (3111696 = 42⁴).

The spelling of 21614406 in words is "twenty-one million, six hundred fourteen thousand, four hundred six".