20820245248 has 72 divisors (see below), whose sum is σ = 46193018256. Its totient is φ = 9285120000.

The previous prime is 20820245231. The next prime is 20820245263. The reversal of 20820245248 is 84254202802.

It is a super-2 number, since 2×20820245248² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79498 + ... + 218998.

It is an arithmetic number, because the mean of its divisors is an integer number (641569698).

Almost surely, 2^20820245248 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 20820245248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23096509128).

20820245248 is an abundant number, since it is smaller than the sum of its proper divisors (25372773008).

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

20820245248 is a wasteful number, since it uses less digits than its factorization.

20820245248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139581 (or 139567 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 37.

The spelling of 20820245248 in words is "twenty billion, eight hundred twenty million, two hundred forty-five thousand, two hundred forty-eight".