20725313224 has 192 divisors, whose sum is σ = 52558450560. Its totient is φ = 7549839360.

The previous prime is 20725313209. The next prime is 20725313239. The reversal of 20725313224 is 42231352702.

It is an interprime number because it is at equal distance from previous prime (20725313209) and next prime (20725313239).

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 47 ways as a sum of consecutive naturals, for example, 12240922 + ... + 12242614.

It is an arithmetic number, because the mean of its divisors is an integer number (273741930).

Almost surely, 2^20725313224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20725313224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26279225280).

20725313224 is an abundant number, since it is smaller than the sum of its proper divisors (31833137336).

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

20725313224 is a wasteful number, since it uses less digits than its factorization.

20725313224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1897 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20725313224 its reverse (42231352702), we get a palindrome (62956665926).

The spelling of 20725313224 in words is "twenty billion, seven hundred twenty-five million, three hundred thirteen thousand, two hundred twenty-four".