12020045838 has 16 divisors (see below), whose sum is σ = 24047525376. Its totient is φ = 4005443000.

The previous prime is 12020045827. The next prime is 12020045861. The reversal of 12020045838 is 83854002021.

It is a super-2 number, since 2×12020045838² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12020045799 and 12020045808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288606 + ... + 327617.

It is an arithmetic number, because the mean of its divisors is an integer number (1502970336).

Almost surely, 2^12020045838 is an apocalyptic number.

12020045838 is an abundant number, since it is smaller than the sum of its proper divisors (12027479538).

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

12020045838 is a wasteful number, since it uses less digits than its factorization.

12020045838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619479.

The product of its (nonzero) digits is 15360, while the sum is 33.

Adding to 12020045838 its reverse (83854002021), we get a palindrome (95874047859).

The spelling of 12020045838 in words is "twelve billion, twenty million, forty-five thousand, eight hundred thirty-eight".