20124400199 has 16 divisors (see below), whose sum is σ = 21590724960. Its totient is φ = 18690017280.

The previous prime is 20124400193. The next prime is 20124400207. The reversal of 20124400199 is 99100442102.

It is a cyclic number.

It is not a de Polignac number, because 20124400199 - 2¹⁶ = 20124334663 is a prime.

It is a super-2 number, since 2×20124400199² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124400193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1234997 + ... + 1251185.

It is an arithmetic number, because the mean of its divisors is an integer number (1349420310).

Almost surely, 2^20124400199 is an apocalyptic number.

20124400199 is a deficient number, since it is larger than the sum of its proper divisors (1466324761).

20124400199 is a wasteful number, since it uses less digits than its factorization.

20124400199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17170.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 20124400199 in words is "twenty billion, one hundred twenty-four million, four hundred thousand, one hundred ninety-nine".