20301324440 has 64 divisors (see below), whose sum is σ = 50172652800. Its totient is φ = 7358643072.

The previous prime is 20301324409. The next prime is 20301324451. The reversal of 20301324440 is 4442310302.

It is a Harshad number since it is a multiple of its sum of digits (23).

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, 563222 + ... + 598181.

It is an arithmetic number, because the mean of its divisors is an integer number (783947700).

Almost surely, 2^20301324440 is an apocalyptic number.

20301324440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20301324440 is an abundant number, since it is smaller than the sum of its proper divisors (29871328360).

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

20301324440 is a wasteful number, since it uses less digits than its factorization.

20301324440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161456 (or 1161452 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20301324440 its reverse (4442310302), we get a palindrome (24743634742).

The spelling of 20301324440 in words is "twenty billion, three hundred one million, three hundred twenty-four thousand, four hundred forty".