20421075199 has 8 divisors (see below), whose sum is σ = 23354946720. Its totient is φ = 17491347456.

The previous prime is 20421075193. The next prime is 20421075211. The reversal of 20421075199 is 99157012402.

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 20421075199 - 2⁷ = 20421075071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421075193) 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 7 ways as a sum of consecutive naturals, for example, 1025374 + ... + 1045099.

It is an arithmetic number, because the mean of its divisors is an integer number (2919368340).

Almost surely, 2^20421075199 is an apocalyptic number.

20421075199 is a deficient number, since it is larger than the sum of its proper divisors (2933871521).

20421075199 is a wasteful number, since it uses less digits than its factorization.

20421075199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071889.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 20421075199 in words is "twenty billion, four hundred twenty-one million, seventy-five thousand, one hundred ninety-nine".