20331012 has 48 divisors (see below), whose sum is σ = 52073280. Its totient is φ = 6135168.

The previous prime is 20330993. The next prime is 20331023. The reversal of 20331012 is 21013302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7039 + ... + 9497.

It is an arithmetic number, because the mean of its divisors is an integer number (1084860).

Almost surely, 2^20331012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20331012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26036640).

20331012 is an abundant number, since it is smaller than the sum of its proper divisors (31742268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20331012 is a wasteful number, since it uses less digits than its factorization.

20331012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532 (or 2530 counting only the distinct ones).

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

The square root of 20331012 is about 4508.9923486296. The cubic root of 20331012 is about 272.9310832493.

Adding to 20331012 its reverse (21013302), we get a palindrome (41344314).

The spelling of 20331012 in words is "twenty million, three hundred thirty-one thousand, twelve".