21079794 has 8 divisors (see below), whose sum is σ = 42159600. Its totient is φ = 7026596.

The previous prime is 21079789. The next prime is 21079801. The reversal of 21079794 is 49797012.

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

21079794 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756644 + ... + 1756655.

It is an arithmetic number, because the mean of its divisors is an integer number (5269950).

Almost surely, 2^21079794 is an apocalyptic number.

21079794 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.

21079794 is a wasteful number, since it uses less digits than its factorization.

21079794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513304.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 21079794 is about 4591.2736794924. The cubic root of 21079794 is about 276.2414134361.

The spelling of 21079794 in words is "twenty-one million, seventy-nine thousand, seven hundred ninety-four".