20022012 has 48 divisors (see below), whose sum is σ = 52702720. Its totient is φ = 6572016.

The previous prime is 20022011. The next prime is 20022017. The reversal of 20022012 is 21022002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20021985 and 20022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5853 + ... + 8619.

Almost surely, 2^20022012 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 20022012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26351360).

20022012 is an abundant number, since it is smaller than the sum of its proper divisors (32680708).

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

20022012 is a wasteful number, since it uses less digits than its factorization.

20022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 20022012 is about 4474.5962946393. The cubic root of 20022012 is about 271.5413080824.

Adding to 20022012 its reverse (21022002), we get a palindrome (41044014).

The spelling of 20022012 in words is "twenty million, twenty-two thousand, twelve".