20012331 has 8 divisors (see below), whose sum is σ = 27120784. Its totient is φ = 13122720.

The previous prime is 20012303. The next prime is 20012341. The reversal of 20012331 is 13321002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20012331 - 2⁷ = 20012203 is a prime.

It is a super-2 number, since 2×20012331² = 800986784107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54496 + ... + 54861.

It is an arithmetic number, because the mean of its divisors is an integer number (3390098).

Almost surely, 2^20012331 is an apocalyptic number.

20012331 is a deficient number, since it is larger than the sum of its proper divisors (7108453).

20012331 is a wasteful number, since it uses less digits than its factorization.

20012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109421.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20012331 is about 4473.5143902753. The cubic root of 20012331 is about 271.4975360046.

Adding to 20012331 its reverse (13321002), we get a palindrome (33333333).

The spelling of 20012331 in words is "twenty million, twelve thousand, three hundred thirty-one".