16503633423 has 6 divisors (see below), whose sum is σ = 23838581624. Its totient is φ = 11002422276.

The previous prime is 16503633413. The next prime is 16503633427. The reversal of 16503633423 is 32433630561.

16503633423 is a `hidden beast` number, since 16 + 5 + 0 + 3 + 633 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 16503633423 - 2⁴ = 16503633407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16503633427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 916868515 + ... + 916868532.

Almost surely, 2^16503633423 is an apocalyptic number.

16503633423 is a deficient number, since it is larger than the sum of its proper divisors (7334948201).

16503633423 is a wasteful number, since it uses less digits than its factorization.

16503633423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833737053 (or 1833737050 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 36.

The spelling of 16503633423 in words is "sixteen billion, five hundred three million, six hundred thirty-three thousand, four hundred twenty-three".