20001254331 has 4 divisors (see below), whose sum is σ = 26668339112. Its totient is φ = 13334169552.

The previous prime is 20001254327. The next prime is 20001254333. The reversal of 20001254331 is 13345210002.

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

It is not a de Polignac number, because 20001254331 - 2² = 20001254327 is a prime.

It is a super-2 number, since 2×20001254331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001254298 and 20001254307.

It is not an unprimeable number, because it can be changed into a prime (20001254333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333542386 + ... + 3333542391.

It is an arithmetic number, because the mean of its divisors is an integer number (6667084778).

Almost surely, 2^20001254331 is an apocalyptic number.

20001254331 is a deficient number, since it is larger than the sum of its proper divisors (6667084781).

20001254331 is an equidigital number, since it uses as much as digits as its factorization.

20001254331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667084780.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20001254331 its reverse (13345210002), we get a palindrome (33346464333).

The spelling of 20001254331 in words is "twenty billion, one million, two hundred fifty-four thousand, three hundred thirty-one".