20321023020 has 48 divisors (see below), whose sum is σ = 59372732160. Its totient is φ = 5183333056.

The previous prime is 20321022983. The next prime is 20321023027. The reversal of 20321023020 is 2032012302.

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

It is not an unprimeable number, because it can be changed into a prime (20321023027) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7361310 + ... + 7364069.

It is an arithmetic number, because the mean of its divisors is an integer number (1236931920).

Almost surely, 2^20321023020 is an apocalyptic number.

20321023020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321023020 is an abundant number, since it is smaller than the sum of its proper divisors (39051709140).

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

20321023020 is a wasteful number, since it uses less digits than its factorization.

20321023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14725414 (or 14725412 counting only the distinct ones).

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

Adding to 20321023020 its reverse (2032012302), we get a palindrome (22353035322).

The spelling of 20321023020 in words is "twenty billion, three hundred twenty-one million, twenty-three thousand, twenty".