20123220036 has 48 divisors (see below), whose sum is σ = 49586620160. Its totient is φ = 6333979680.

The previous prime is 20123220001. The next prime is 20123220037. The reversal of 20123220036 is 63002232102.

It is a junction number, because it is equal to n+sod(n) for n = 20123219994 and 20123220021.

It is not an unprimeable number, because it can be changed into a prime (20123220037) 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, 73750 + ... + 213741.

Almost surely, 2^20123220036 is an apocalyptic number.

It is an amenable number.

20123220036 is an abundant number, since it is smaller than the sum of its proper divisors (29463400124).

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

20123220036 is a wasteful number, since it uses less digits than its factorization.

20123220036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287824 (or 287822 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20123220036 its reverse (63002232102), we get a palindrome (83125452138).

The spelling of 20123220036 in words is "twenty billion, one hundred twenty-three million, two hundred twenty thousand, thirty-six".