20342120320 has 32 divisors (see below), whose sum is σ = 48630382920. Its totient is φ = 8136847872.

The previous prime is 20342120251. The next prime is 20342120339. The reversal of 20342120320 is 2302124302.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×20342120320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15891642 + ... + 15892921.

Almost surely, 2^20342120320 is an apocalyptic number.

20342120320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20342120320 is an abundant number, since it is smaller than the sum of its proper divisors (28288262600).

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

20342120320 is an equidigital number, since it uses as much as digits as its factorization.

20342120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31784582 (or 31784570 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20342120320 its reverse (2302124302), we get a palindrome (22644244622).

The spelling of 20342120320 in words is "twenty billion, three hundred forty-two million, one hundred twenty thousand, three hundred twenty".