20402224999 has 8 divisors (see below), whose sum is σ = 22036829360. Its totient is φ = 18776935296.

The previous prime is 20402224993. The next prime is 20402225017. The reversal of 20402224999 is 99942220402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20402224999 - 2³ = 20402224991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402224991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2324109 + ... + 2332870.

It is an arithmetic number, because the mean of its divisors is an integer number (2754603670).

Almost surely, 2^20402224999 is an apocalyptic number.

20402224999 is a deficient number, since it is larger than the sum of its proper divisors (1634604361).

20402224999 is a wasteful number, since it uses less digits than its factorization.

20402224999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657329.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 20402224999 in words is "twenty billion, four hundred two million, two hundred twenty-four thousand, nine hundred ninety-nine".