21359694 has 8 divisors (see below), whose sum is σ = 42719400. Its totient is φ = 7119896.

The previous prime is 21359671. The next prime is 21359707. The reversal of 21359694 is 49695312.

It is a sphenic number, since it is the product of 3 distinct primes.

21359694 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1779969 + ... + 1779980.

It is an arithmetic number, because the mean of its divisors is an integer number (5339925).

Almost surely, 2^21359694 is an apocalyptic number.

21359694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21359694 is a wasteful number, since it uses less digits than its factorization.

21359694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559954.

The product of its digits is 58320, while the sum is 39.

The square root of 21359694 is about 4621.6548984103. The cubic root of 21359694 is about 277.4586968801.

The spelling of 21359694 in words is "twenty-one million, three hundred fifty-nine thousand, six hundred ninety-four".