21614996 has 12 divisors (see below), whose sum is σ = 40736052. Its totient is φ = 9976128.

The previous prime is 21614981. The next prime is 21615001. The reversal of 21614996 is 69941612.

It can be written as a sum of positive squares in 2 ways, for example, as 2131600 + 19483396 = 1460^2 + 4414^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207785 + ... + 207888.

It is an arithmetic number, because the mean of its divisors is an integer number (3394671).

Almost surely, 2^21614996 is an apocalyptic number.

21614996 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21614996 is a deficient number, since it is larger than the sum of its proper divisors (19121056).

21614996 is a wasteful number, since it uses less digits than its factorization.

21614996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415690 (or 415688 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 21614996 is about 4649.1930482612. The cubic root of 21614996 is about 278.5597644282.

The spelling of 21614996 in words is "twenty-one million, six hundred fourteen thousand, nine hundred ninety-six".