20011220310 has 64 divisors (see below), whose sum is σ = 48807009792. Its totient is φ = 5249857536.

The previous prime is 20011220303. The next prime is 20011220351. The reversal of 20011220310 is 1302211002.

It is a super-2 number, since 2×20011220310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1648182 + ... + 1660278.

It is an arithmetic number, because the mean of its divisors is an integer number (762609528).

Almost surely, 2^20011220310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011220310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24403504896).

20011220310 is an abundant number, since it is smaller than the sum of its proper divisors (28795789482).

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

20011220310 is a wasteful number, since it uses less digits than its factorization.

20011220310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12997.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20011220310 its reverse (1302211002), we get a palindrome (21313431312).

The spelling of 20011220310 in words is "twenty billion, eleven million, two hundred twenty thousand, three hundred ten".