21713694 has 16 divisors (see below), whose sum is σ = 45713280. Its totient is φ = 6856920.

The previous prime is 21713693. The next prime is 21713707. The reversal of 21713694 is 49631712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21713693) by changing a digit.

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, 95122 + ... + 95349.

It is an arithmetic number, because the mean of its divisors is an integer number (2857080).

Almost surely, 2^21713694 is an apocalyptic number.

21713694 is an abundant number, since it is smaller than the sum of its proper divisors (23999586).

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

21713694 is a wasteful number, since it uses less digits than its factorization.

21713694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190495.

The product of its digits is 9072, while the sum is 33.

The square root of 21713694 is about 4659.7954890746. The cubic root of 21713694 is about 278.9831055661.

The spelling of 21713694 in words is "twenty-one million, seven hundred thirteen thousand, six hundred ninety-four".