20303201999 has 12 divisors (see below), whose sum is σ = 21593295696. Its totient is φ = 19053969792.

The previous prime is 20303201981. The next prime is 20303202013. The reversal of 20303201999 is 99910230302.

It is not a de Polignac number, because 20303201999 - 2³² = 16008234703 is a prime.

It is a super-4 number, since 4×20303201999⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303201909) 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, 92522 + ... + 221735.

It is an arithmetic number, because the mean of its divisors is an integer number (1799441308).

Almost surely, 2^20303201999 is an apocalyptic number.

20303201999 is a deficient number, since it is larger than the sum of its proper divisors (1290093697).

20303201999 is an equidigital number, since it uses as much as digits as its factorization.

20303201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314386 (or 314333 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 20303201999 in words is "twenty billion, three hundred three million, two hundred one thousand, nine hundred ninety-nine".