19840424923 has 32 divisors (see below), whose sum is σ = 23692616640. Its totient is φ = 16409088000.

The previous prime is 19840424893. The next prime is 19840424959. The reversal of 19840424923 is 32942404891.

It is a cyclic number.

It is not a de Polignac number, because 19840424923 - 2³³ = 11250490331 is a prime.

It is a super-2 number, since 2×19840424923² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19840424963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 823833 + ... + 847573.

It is an arithmetic number, because the mean of its divisors is an integer number (740394270).

Almost surely, 2^19840424923 is an apocalyptic number.

19840424923 is a deficient number, since it is larger than the sum of its proper divisors (3852191717).

19840424923 is a wasteful number, since it uses less digits than its factorization.

19840424923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23919.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 19840424923 in words is "nineteen billion, eight hundred forty million, four hundred twenty-four thousand, nine hundred twenty-three".