21069796 has 24 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 9544800.

The previous prime is 21069791. The next prime is 21069833. The reversal of 21069796 is 69796012.

It is not an unprimeable number, because it can be changed into a prime (21069791) 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, 16501 + ... + 17731.

It is an arithmetic number, because the mean of its divisors is an integer number (1681680).

Almost surely, 2^21069796 is an apocalyptic number.

It is an amenable number.

21069796 is a deficient number, since it is larger than the sum of its proper divisors (19290524).

21069796 is a wasteful number, since it uses less digits than its factorization.

21069796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 21069796 is about 4590.1847457374. The cubic root of 21069796 is about 276.1977334012.

The spelling of 21069796 in words is "twenty-one million, sixty-nine thousand, seven hundred ninety-six".