20142320 has 80 divisors (see below), whose sum is σ = 52282368. Its totient is φ = 7153920.

The previous prime is 20142313. The next prime is 20142323. The reversal of 20142320 is 2324102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20142295 and 20142304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142323) 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, 41117 + ... + 41603.

Almost surely, 2^20142320 is an apocalyptic number.

20142320 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 20142320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26141184).

20142320 is an abundant number, since it is smaller than the sum of its proper divisors (32140048).

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

20142320 is a wasteful number, since it uses less digits than its factorization.

20142320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20142320 is about 4488.0196078003. The cubic root of 20142320 is about 272.0841002917.

Adding to 20142320 its reverse (2324102), we get a palindrome (22466422).

It can be divided in two parts, 2014 and 2320, that added together give a palindrome (4334).

The spelling of 20142320 in words is "twenty million, one hundred forty-two thousand, three hundred twenty".