20012112 has 60 divisors (see below), whose sum is σ = 57825664. Its totient is φ = 6454080.

The previous prime is 20012101. The next prime is 20012119. The reversal of 20012112 is 21121002.

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 = 20012094 and 20012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012119) 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, 2223 + ... + 6705.

Almost surely, 2^20012112 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 20012112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28912832).

20012112 is an abundant number, since it is smaller than the sum of its proper divisors (37813552).

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

20012112 is a wasteful number, since it uses less digits than its factorization.

20012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528 (or 4519 counting only the distinct ones).

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

The square root of 20012112 is about 4473.4899128086. The cubic root of 20012112 is about 271.4965456455.

Adding to 20012112 its reverse (21121002), we get a palindrome (41133114).

The spelling of 20012112 in words is "twenty million, twelve thousand, one hundred twelve".