21682914 has 32 divisors (see below), whose sum is σ = 49800960. Its totient is φ = 6224400.

The previous prime is 21682909. The next prime is 21682931. The reversal of 21682914 is 41928612.

21682914 = T₃₄₇ + T₃₄₈ + ... + T₅₅₅.

It is a Harshad number since it is a multiple of its sum of digits (33).

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 15 ways as a sum of consecutive naturals, for example, 7392 + ... + 9899.

It is an arithmetic number, because the mean of its divisors is an integer number (1556280).

Almost surely, 2^21682914 is an apocalyptic number.

21682914 is an abundant number, since it is smaller than the sum of its proper divisors (28118046).

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

21682914 is a wasteful number, since it uses less digits than its factorization.

21682914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17326.

The product of its digits is 6912, while the sum is 33.

The square root of 21682914 is about 4656.4915977590. The cubic root of 21682914 is about 278.8512201193.

The spelling of 21682914 in words is "twenty-one million, six hundred eighty-two thousand, nine hundred fourteen".