21693714 has 16 divisors (see below), whose sum is σ = 49585728. Its totient is φ = 6198192.

The previous prime is 21693713. The next prime is 21693739. The reversal of 21693714 is 41739612.

It is a super-2 number, since 2×21693714² = 941234454227592, which contains 22 as substring.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (21693713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258217 + ... + 258300.

It is an arithmetic number, because the mean of its divisors is an integer number (3099108).

Almost surely, 2^21693714 is an apocalyptic number.

21693714 is an abundant number, since it is smaller than the sum of its proper divisors (27892014).

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

21693714 is a wasteful number, since it uses less digits than its factorization.

21693714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516529.

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

The square root of 21693714 is about 4657.6511247624. The cubic root of 21693714 is about 278.8975099200.

The spelling of 21693714 in words is "twenty-one million, six hundred ninety-three thousand, seven hundred fourteen".