20321300052 has 36 divisors (see below), whose sum is σ = 54071297280. Its totient is φ = 6417252432.

The previous prime is 20321299931. The next prime is 20321300053. The reversal of 20321300052 is 25000312302.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20321299998 and 20321300034.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321300053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14854068 + ... + 14855435.

It is an arithmetic number, because the mean of its divisors is an integer number (1501980480).

Almost surely, 2^20321300052 is an apocalyptic number.

It is an amenable number.

20321300052 is an abundant number, since it is smaller than the sum of its proper divisors (33749997228).

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

20321300052 is a wasteful number, since it uses less digits than its factorization.

20321300052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29709532 (or 29709527 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20321300052 its reverse (25000312302), we get a palindrome (45321612354).

The spelling of 20321300052 in words is "twenty billion, three hundred twenty-one million, three hundred thousand, fifty-two".