16918323477 has 16 divisors (see below), whose sum is σ = 24610713600. Its totient is φ = 10252594800.

The previous prime is 16918323473. The next prime is 16918323479. The reversal of 16918323477 is 77432381961.

It is a happy number.

It is not a de Polignac number, because 16918323477 - 2² = 16918323473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16918323473) 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, 566202 + ... + 595332.

It is an arithmetic number, because the mean of its divisors is an integer number (1538169600).

Almost surely, 2^16918323477 is an apocalyptic number.

It is an amenable number.

16918323477 is a deficient number, since it is larger than the sum of its proper divisors (7692390123).

16918323477 is a wasteful number, since it uses less digits than its factorization.

16918323477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46744.

The product of its digits is 1524096, while the sum is 51.

The spelling of 16918323477 in words is "sixteen billion, nine hundred eighteen million, three hundred twenty-three thousand, four hundred seventy-seven".