21199707670 has 32 divisors (see below), whose sum is σ = 39464755200. Its totient is φ = 8194389216.

The previous prime is 21199707667. The next prime is 21199707677. The reversal of 21199707670 is 7670799112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21199707677) 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, 248350 + ... + 322609.

It is an arithmetic number, because the mean of its divisors is an integer number (1233273600).

Almost surely, 2^21199707670 is an apocalyptic number.

21199707670 is a deficient number, since it is larger than the sum of its proper divisors (18265047530).

21199707670 is a wasteful number, since it uses less digits than its factorization.

21199707670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571092.

The product of its (nonzero) digits is 333396, while the sum is 49.

The spelling of 21199707670 in words is "twenty-one billion, one hundred ninety-nine million, seven hundred seven thousand, six hundred seventy".