20123012 has 48 divisors (see below), whose sum is σ = 44123520. Its totient is φ = 7817472.

The previous prime is 20122997. The next prime is 20123017. The reversal of 20123012 is 21032102.

It is a happy number.

It is a super-2 number, since 2×20123012² = 809871223904288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20122984 and 20123002.

It is not an unprimeable number, because it can be changed into a prime (20123017) 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, 21008 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (919240).

Almost surely, 2^20123012 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 20123012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22061760).

20123012 is an abundant number, since it is smaller than the sum of its proper divisors (24000508).

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

20123012 is a wasteful number, since it uses less digits than its factorization.

20123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20123012 is about 4485.8680319421. The cubic root of 20123012 is about 271.9971344854.

Adding to 20123012 its reverse (21032102), we get a palindrome (41155114).

The spelling of 20123012 in words is "twenty million, one hundred twenty-three thousand, twelve".