20012323122 has 48 divisors (see below), whose sum is σ = 48455578080. Its totient is φ = 5916427200.

The previous prime is 20012323043. The next prime is 20012323129. The reversal of 20012323122 is 22132321002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20012323095 and 20012323104.

It is not an unprimeable number, because it can be changed into a prime (20012323129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1224472 + ... + 1240707.

It is an arithmetic number, because the mean of its divisors is an integer number (1009491210).

Almost surely, 2^20012323122 is an apocalyptic number.

20012323122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20012323122 is an abundant number, since it is smaller than the sum of its proper divisors (28443254958).

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

20012323122 is a wasteful number, since it uses less digits than its factorization.

20012323122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465239 (or 2465236 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20012323122 its reverse (22132321002), we get a palindrome (42144644124).

The spelling of 20012323122 in words is "twenty billion, twelve million, three hundred twenty-three thousand, one hundred twenty-two".