20204325540 has 144 divisors (see below), whose sum is σ = 70546170240. Its totient is φ = 4584867840.

The previous prime is 20204325539. The next prime is 20204325541. The reversal of 20204325540 is 4552340202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20204325539) and next prime (20204325541).

It is not an unprimeable number, because it can be changed into a prime (20204325541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 117460 + ... + 232820.

It is an arithmetic number, because the mean of its divisors is an integer number (489903960).

Almost surely, 2^20204325540 is an apocalyptic number.

20204325540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20204325540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35273085120).

20204325540 is an abundant number, since it is smaller than the sum of its proper divisors (50341844700).

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

20204325540 is a wasteful number, since it uses less digits than its factorization.

20204325540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115522 (or 115517 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 20204325540 its reverse (4552340202), we get a palindrome (24756665742).

It can be divided in two parts, 20204 and 325540, that added together give a square (345744 = 588²).

The spelling of 20204325540 in words is "twenty billion, two hundred four million, three hundred twenty-five thousand, five hundred forty".