20021000112 has 60 divisors (see below), whose sum is σ = 58980001080. Its totient is φ = 6322420224.

The previous prime is 20021000101. The next prime is 20021000117. The reversal of 20021000112 is 21100012002.

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 = 20021000094 and 20021000103.

It is not an unprimeable number, because it can be changed into a prime (20021000117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3656073 + ... + 3661544.

It is an arithmetic number, because the mean of its divisors is an integer number (983000018).

Almost surely, 2^20021000112 is an apocalyptic number.

It is an amenable number.

20021000112 is an abundant number, since it is smaller than the sum of its proper divisors (38959000968).

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

20021000112 is a wasteful number, since it uses less digits than its factorization.

20021000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317650 (or 7317641 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20021000112 its reverse (21100012002), we get a palindrome (41121012114).

The spelling of 20021000112 in words is "twenty billion, twenty-one million, one hundred twelve", and thus it is an aban number.