20402535199 has 4 divisors (see below), whose sum is σ = 20604540600. Its totient is φ = 20200529800.

The previous prime is 20402535173. The next prime is 20402535203. The reversal of 20402535199 is 99153520402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20402535199 - 2¹³ = 20402527007 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 (20402535299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101002549 + ... + 101002750.

It is an arithmetic number, because the mean of its divisors is an integer number (5151135150).

Almost surely, 2^20402535199 is an apocalyptic number.

20402535199 is a deficient number, since it is larger than the sum of its proper divisors (202005401).

20402535199 is a wasteful number, since it uses less digits than its factorization.

20402535199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202005400.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 20402535199 in words is "twenty billion, four hundred two million, five hundred thirty-five thousand, one hundred ninety-nine".