20213431111104 has 224 divisors, whose sum is σ = 66888427885056. Its totient is φ = 5233678356480.

The previous prime is 20213431111103. The next prime is 20213431111117. The reversal of 20213431111104 is 40111113431202.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213431111103) 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, 2529982 + ... + 6843074.

Almost surely, 2^{20213431111104} is an apocalyptic number.

20213431111104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20213431111104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33444213942528).

20213431111104 is an abundant number, since it is smaller than the sum of its proper divisors (46674996773952).

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

20213431111104 is a wasteful number, since it uses less digits than its factorization.

20213431111104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4313443 (or 4313433 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 20213431111104 its reverse (40111113431202), we get a palindrome (60324544542306).

The spelling of 20213431111104 in words is "twenty trillion, two hundred thirteen billion, four hundred thirty-one million, one hundred eleven thousand, one hundred four".