16991342904 has 32 divisors (see below), whose sum is σ = 43943130000. Its totient is φ = 5468477952.

The previous prime is 16991342899. The next prime is 16991342909. The reversal of 16991342904 is 40924319961.

It is a happy number.

16991342904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16991342899) and next prime (16991342909).

It is a super-2 number, since 2×16991342904² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991342909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12205729 + ... + 12207120.

Almost surely, 2^16991342904 is an apocalyptic number.

It is an amenable number.

16991342904 is an abundant number, since it is smaller than the sum of its proper divisors (26951787096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16991342904 is a wasteful number, since it uses less digits than its factorization.

16991342904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24412887 (or 24412883 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The spelling of 16991342904 in words is "sixteen billion, nine hundred ninety-one million, three hundred forty-two thousand, nine hundred four".