16806905938 has 4 divisors (see below), whose sum is σ = 25210358910. Its totient is φ = 8403452968.

The previous prime is 16806905903. The next prime is 16806905939. The reversal of 16806905938 is 83950960861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16787607489 + 19298449 = 129567^2 + 4393^2 .

It is not an unprimeable number, because it can be changed into a prime (16806905939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4201726483 + ... + 4201726486.

Almost surely, 2^16806905938 is an apocalyptic number.

16806905938 is a deficient number, since it is larger than the sum of its proper divisors (8403452972).

16806905938 is an equidigital number, since it uses as much as digits as its factorization.

16806905938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8403452971.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 16806905938 in words is "sixteen billion, eight hundred six million, nine hundred five thousand, nine hundred thirty-eight".