20020231320 has 64 divisors (see below), whose sum is σ = 62672037120. Its totient is φ = 5106609024.

The previous prime is 20020231267. The next prime is 20020231331. The reversal of 20020231320 is 2313202002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20020231320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3624094 + ... + 3629613.

It is an arithmetic number, because the mean of its divisors is an integer number (979250580).

Almost surely, 2^20020231320 is an apocalyptic number.

20020231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020231320 is an abundant number, since it is smaller than the sum of its proper divisors (42651805800).

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

20020231320 is a wasteful number, since it uses less digits than its factorization.

20020231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253744 (or 7253740 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20020231320 its reverse (2313202002), we get a palindrome (22333433322).

The spelling of 20020231320 in words is "twenty billion, twenty million, two hundred thirty-one thousand, three hundred twenty".