20103312042 has 96 divisors (see below), whose sum is σ = 47912230080. Its totient is φ = 6041468160.

The previous prime is 20103312041. The next prime is 20103312059. The reversal of 20103312042 is 24021330102.

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

It is not an unprimeable number, because it can be changed into a prime (20103312041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14067384 + ... + 14068812.

It is an arithmetic number, because the mean of its divisors is an integer number (499085730).

Almost surely, 2^20103312042 is an apocalyptic number.

20103312042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103312042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23956115040).

20103312042 is an abundant number, since it is smaller than the sum of its proper divisors (27808918038).

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

20103312042 is a wasteful number, since it uses less digits than its factorization.

20103312042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988 (or 1985 counting only the distinct ones).

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

Adding to 20103312042 its reverse (24021330102), we get a palindrome (44124642144).

The spelling of 20103312042 in words is "twenty billion, one hundred three million, three hundred twelve thousand, forty-two".