20939817302 has 8 divisors (see below), whose sum is σ = 31508811216. Its totient is φ = 10436880232.

The previous prime is 20939817299. The next prime is 20939817307. The reversal of 20939817302 is 20371893902.

It is a happy number.

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

It is a super-2 number, since 2×20939817302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20939817307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16513418 + ... + 16514685.

It is an arithmetic number, because the mean of its divisors is an integer number (3938601402).

Almost surely, 2^20939817302 is an apocalyptic number.

20939817302 is a deficient number, since it is larger than the sum of its proper divisors (10568993914).

20939817302 is a wasteful number, since it uses less digits than its factorization.

20939817302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33028422.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 20939817302 in words is "twenty billion, nine hundred thirty-nine million, eight hundred seventeen thousand, three hundred two".