20303554231 has 4 divisors (see below), whose sum is σ = 20334935952. Its totient is φ = 20272172512.

The previous prime is 20303554213. The next prime is 20303554309. The reversal of 20303554231 is 13245530302.

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 20303554231 - 2⁹ = 20303553719 is a prime.

It is a super-2 number, since 2×20303554231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20303554231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303554331) 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, 15689890 + ... + 15691183.

It is an arithmetic number, because the mean of its divisors is an integer number (5083733988).

Almost surely, 2^20303554231 is an apocalyptic number.

20303554231 is a deficient number, since it is larger than the sum of its proper divisors (31381721).

20303554231 is an equidigital number, since it uses as much as digits as its factorization.

20303554231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31381720.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 20303554231 in words is "twenty billion, three hundred three million, five hundred fifty-four thousand, two hundred thirty-one".