16947861623 has 24 divisors (see below), whose sum is σ = 22639086720. Its totient is φ = 12511059120.

The previous prime is 16947861571. The next prime is 16947861643. The reversal of 16947861623 is 32616874961.

It is not a de Polignac number, because 16947861623 - 2⁸ = 16947861367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16947861643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 817211 + ... + 837692.

It is an arithmetic number, because the mean of its divisors is an integer number (943295280).

Almost surely, 2^16947861623 is an apocalyptic number.

16947861623 is a deficient number, since it is larger than the sum of its proper divisors (5691225097).

16947861623 is a wasteful number, since it uses less digits than its factorization.

16947861623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654947 (or 1654940 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The spelling of 16947861623 in words is "sixteen billion, nine hundred forty-seven million, eight hundred sixty-one thousand, six hundred twenty-three".