20310300018 has 64 divisors (see below), whose sum is σ = 45928131840. Its totient is φ = 6651244800.

The previous prime is 20310299987. The next prime is 20310300019. The reversal of 20310300018 is 81000301302.

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 (20310300019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3215083 + ... + 3221393.

It is an arithmetic number, because the mean of its divisors is an integer number (717627060).

Almost surely, 2^20310300018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310300018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22964065920).

20310300018 is an abundant number, since it is smaller than the sum of its proper divisors (25617831822).

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

20310300018 is a wasteful number, since it uses less digits than its factorization.

20310300018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7360 (or 7354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 20310300018 in words is "twenty billion, three hundred ten million, three hundred thousand, eighteen".