20042438199 has 12 divisors (see below), whose sum is σ = 31086230904. Its totient is φ = 11452821744.

The previous prime is 20042438179. The next prime is 20042438209. The reversal of 20042438199 is 99183424002.

It is not a de Polignac number, because 20042438199 - 2¹¹ = 20042436151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20042438199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042438179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68171412 + ... + 68171705.

It is an arithmetic number, because the mean of its divisors is an integer number (2590519242).

Almost surely, 2^20042438199 is an apocalyptic number.

20042438199 is a deficient number, since it is larger than the sum of its proper divisors (11043792705).

20042438199 is a wasteful number, since it uses less digits than its factorization.

20042438199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136343134 (or 136343127 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 20042438199 in words is "twenty billion, forty-two million, four hundred thirty-eight thousand, one hundred ninety-nine".