20423131120 has 40 divisors (see below), whose sum is σ = 54267178464. Its totient is φ = 7002216192.

The previous prime is 20423131117. The next prime is 20423131123. The reversal of 20423131120 is 2113132402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20423131117) and next prime (20423131123).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423131123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18234379 + ... + 18235498.

Almost surely, 2^20423131120 is an apocalyptic number.

20423131120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423131120 is an abundant number, since it is smaller than the sum of its proper divisors (33844047344).

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

20423131120 is a wasteful number, since it uses less digits than its factorization.

20423131120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36469897 (or 36469891 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20423131120 its reverse (2113132402), we get a palindrome (22536263522).

The spelling of 20423131120 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-one thousand, one hundred twenty".