16881840842 has 4 divisors (see below), whose sum is σ = 25322761266. Its totient is φ = 8440920420.

The previous prime is 16881840827. The next prime is 16881840869. The reversal of 16881840842 is 24804818861.

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., 12463712881 + 4418127961 = 111641^2 + 66469^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4220460209 + ... + 4220460212.

Almost surely, 2^16881840842 is an apocalyptic number.

16881840842 is a deficient number, since it is larger than the sum of its proper divisors (8440920424).

16881840842 is an equidigital number, since it uses as much as digits as its factorization.

16881840842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8440920423.

The product of its (nonzero) digits is 786432, while the sum is 50.

The spelling of 16881840842 in words is "sixteen billion, eight hundred eighty-one million, eight hundred forty thousand, eight hundred forty-two".