21030796 has 12 divisors (see below), whose sum is σ = 38741080. Its totient is φ = 9961920.

The previous prime is 21030791. The next prime is 21030797. The reversal of 21030796 is 69703012.

It is not an unprimeable number, because it can be changed into a prime (21030791) 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 3 ways as a sum of consecutive naturals, for example, 138285 + ... + 138436.

Almost surely, 2^21030796 is an apocalyptic number.

It is an amenable number.

21030796 is a deficient number, since it is larger than the sum of its proper divisors (17710284).

21030796 is a wasteful number, since it uses less digits than its factorization.

21030796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276744 (or 276742 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 21030796 is about 4585.9345830485. The cubic root of 21030796 is about 276.0272149877.

The spelling of 21030796 in words is "twenty-one million, thirty thousand, seven hundred ninety-six".