21694060 has 24 divisors (see below), whose sum is σ = 47539296. Its totient is φ = 8300160.

The previous prime is 21694031. The next prime is 21694061. The reversal of 21694060 is 6049612.

It is not an unprimeable number, because it can be changed into a prime (21694061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23121 + ... + 24040.

It is an arithmetic number, because the mean of its divisors is an integer number (1980804).

Almost surely, 2^21694060 is an apocalyptic number.

21694060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21694060 is an abundant number, since it is smaller than the sum of its proper divisors (25845236).

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

21694060 is a wasteful number, since it uses less digits than its factorization.

21694060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47193 (or 47191 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 21694060 is about 4657.6882677998. The cubic root of 21694060 is about 278.8989926540.

The spelling of 21694060 in words is "twenty-one million, six hundred ninety-four thousand, sixty".