16939238616923 has 32 divisors (see below), whose sum is σ = 20346969139200. Its totient is φ = 13802732760960.

The previous prime is 16939238616917. The next prime is 16939238616959. The reversal of 16939238616923 is 32961683293961.

It is a cyclic number.

It is not a de Polignac number, because 16939238616923 - 2⁴ = 16939238616907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16939238616023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4069523 + ... + 7102076.

It is an arithmetic number, because the mean of its divisors is an integer number (635842785600).

Almost surely, 2^{16939238616923} is an apocalyptic number.

16939238616923 is a deficient number, since it is larger than the sum of its proper divisors (3407730522277).

16939238616923 is a wasteful number, since it uses less digits than its factorization.

16939238616923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11171787.

The product of its digits is 136048896, while the sum is 68.

The spelling of 16939238616923 in words is "sixteen trillion, nine hundred thirty-nine billion, two hundred thirty-eight million, six hundred sixteen thousand, nine hundred twenty-three".