16686221942 has 32 divisors (see below), whose sum is σ = 27516780480. Its totient is φ = 7541838720.

The previous prime is 16686221911. The next prime is 16686221947. The reversal of 16686221942 is 24912268661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16686221947) 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, 340223 + ... + 386165.

It is an arithmetic number, because the mean of its divisors is an integer number (859899390).

Almost surely, 2^16686221942 is an apocalyptic number.

16686221942 is a deficient number, since it is larger than the sum of its proper divisors (10830558538).

16686221942 is a wasteful number, since it uses less digits than its factorization.

16686221942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46248.

The product of its digits is 497664, while the sum is 47.

The spelling of 16686221942 in words is "sixteen billion, six hundred eighty-six million, two hundred twenty-one thousand, nine hundred forty-two".