20725673472 has 800 divisors, whose sum is σ = 76052275200. Its totient is φ = 5608673280.

The previous prime is 20725673467. The next prime is 20725673477. The reversal of 20725673472 is 27437652702.

It is an interprime number because it is at equal distance from previous prime (20725673467) and next prime (20725673477).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725673477) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 440971753 + ... + 440971799.

It is an arithmetic number, because the mean of its divisors is an integer number (95065344).

Almost surely, 2^20725673472 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 20725673472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38026137600).

20725673472 is an abundant number, since it is smaller than the sum of its proper divisors (55326601728).

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

20725673472 is an frugal number, since it uses more digits than its factorization.

20725673472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 45.

The spelling of 20725673472 in words is "twenty billion, seven hundred twenty-five million, six hundred seventy-three thousand, four hundred seventy-two".