20021020112 has 10 divisors (see below), whose sum is σ = 38790726498. Its totient is φ = 10010510048.

The previous prime is 20021020111. The next prime is 20021020147. The reversal of 20021020112 is 21102012002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20017722256 + 3297856 = 141484^2 + 1816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20021020093 and 20021020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021020111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625656863 + ... + 625656894.

Almost surely, 2^20021020112 is an apocalyptic number.

It is an amenable number.

20021020112 is a deficient number, since it is larger than the sum of its proper divisors (18769706386).

20021020112 is a wasteful number, since it uses less digits than its factorization.

20021020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251313765 (or 1251313759 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021020112 its reverse (21102012002), we get a palindrome (41123032114).

The spelling of 20021020112 in words is "twenty billion, twenty-one million, twenty thousand, one hundred twelve".