20939817346 has 8 divisors (see below), whose sum is σ = 35896829760. Its totient is φ = 8974207428.

The previous prime is 20939817323. The next prime is 20939817347. The reversal of 20939817346 is 64371893902.

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

It is a junction number, because it is equal to n+sod(n) for n = 20939817293 and 20939817302.

It is not an unprimeable number, because it can be changed into a prime (20939817347) 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, 747850606 + ... + 747850633.

It is an arithmetic number, because the mean of its divisors is an integer number (4487103720).

Almost surely, 2^20939817346 is an apocalyptic number.

20939817346 is a deficient number, since it is larger than the sum of its proper divisors (14957012414).

20939817346 is a wasteful number, since it uses less digits than its factorization.

20939817346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495701248.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 20939817346 in words is "twenty billion, nine hundred thirty-nine million, eight hundred seventeen thousand, three hundred forty-six".