20012233331 has 4 divisors (see below), whose sum is σ = 20038123152. Its totient is φ = 19986343512.

The previous prime is 20012233309. The next prime is 20012233337. The reversal of 20012233331 is 13333221002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012233331 is a prime.

It is a super-2 number, since 2×20012233331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012233337) 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 3 ways as a sum of consecutive naturals, for example, 12943751 + ... + 12945296.

It is an arithmetic number, because the mean of its divisors is an integer number (5009530788).

Almost surely, 2^20012233331 is an apocalyptic number.

20012233331 is a deficient number, since it is larger than the sum of its proper divisors (25889821).

20012233331 is an equidigital number, since it uses as much as digits as its factorization.

20012233331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25889820.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20012233331 its reverse (13333221002), we get a palindrome (33345454333).

The spelling of 20012233331 in words is "twenty billion, twelve million, two hundred thirty-three thousand, three hundred thirty-one".