20431654199 has 16 divisors (see below), whose sum is σ = 23562938880. Its totient is φ = 17521076160.

The previous prime is 20431654163. The next prime is 20431654213. The reversal of 20431654199 is 99145613402.

It is a cyclic number.

It is not a de Polignac number, because 20431654199 - 2³² = 16136686903 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 (20431654109) 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 15 ways as a sum of consecutive naturals, for example, 161087 + ... + 258480.

It is an arithmetic number, because the mean of its divisors is an integer number (1472683680).

Almost surely, 2^20431654199 is an apocalyptic number.

20431654199 is a deficient number, since it is larger than the sum of its proper divisors (3131284681).

20431654199 is a wasteful number, since it uses less digits than its factorization.

20431654199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419830.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 20431654199 in words is "twenty billion, four hundred thirty-one million, six hundred fifty-four thousand, one hundred ninety-nine".