20218400310 has 64 divisors (see below), whose sum is σ = 49620501504. Its totient is φ = 5270054400.

The previous prime is 20218400239. The next prime is 20218400311. The reversal of 20218400310 is 1300481202.

It is a super-2 number, since 2×20218400310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20218400311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1134670 + ... + 1152350.

It is an arithmetic number, because the mean of its divisors is an integer number (775320336).

Almost surely, 2^20218400310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20218400310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24810250752).

20218400310 is an abundant number, since it is smaller than the sum of its proper divisors (29402101194).

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

20218400310 is a wasteful number, since it uses less digits than its factorization.

20218400310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18549.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20218400310 its reverse (1300481202), we get a palindrome (21518881512).

The spelling of 20218400310 in words is "twenty billion, two hundred eighteen million, four hundred thousand, three hundred ten".