679910000021 has 16 divisors (see below), whose sum is σ = 780639619200. Its totient is φ = 580084727040.

The previous prime is 679909999999. The next prime is 679910000047. The reversal of 679910000021 is 120000019976.

It is not a de Polignac number, because 679910000021 - 2⁶ = 679909999957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679910000071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1658630 + ... + 2027528.

It is an arithmetic number, because the mean of its divisors is an integer number (48789976200).

Almost surely, 2^679910000021 is an apocalyptic number.

It is an amenable number.

679910000021 is a deficient number, since it is larger than the sum of its proper divisors (100729619179).

679910000021 is a wasteful number, since it uses less digits than its factorization.

679910000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370124.

The product of its (nonzero) digits is 6804, while the sum is 35.

Adding to 679910000021 its reverse (120000019976), we get a palindrome (799910019997).

The spelling of 679910000021 in words is "six hundred seventy-nine billion, nine hundred ten million, twenty-one", and thus it is an aban number.