20420311120 has 80 divisors (see below), whose sum is σ = 51897428352. Its totient is φ = 7410644480.

The previous prime is 20420311081. The next prime is 20420311127. The reversal of 20420311120 is 2111302402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20420311094 and 20420311103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420311127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419574 + ... + 465706.

Almost surely, 2^20420311120 is an apocalyptic number.

20420311120 is a gapful number since it is divisible by the number (20) 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 20420311120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25948714176).

20420311120 is an abundant number, since it is smaller than the sum of its proper divisors (31477117232).

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

20420311120 is a wasteful number, since it uses less digits than its factorization.

20420311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46660 (or 46654 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20420311120 its reverse (2111302402), we get a palindrome (22531613522).

The spelling of 20420311120 in words is "twenty billion, four hundred twenty million, three hundred eleven thousand, one hundred twenty".