20597245812 has 288 divisors, whose sum is σ = 63589236480. Its totient is φ = 5727110400.

The previous prime is 20597245789. The next prime is 20597245819. The reversal of 20597245812 is 21854279502.

20597245812 is a `hidden beast` number, since 2 + 0 + 597 + 2 + 4 + 58 + 1 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597245819) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 44679262 + ... + 44679722.

It is an arithmetic number, because the mean of its divisors is an integer number (220795960).

Almost surely, 2^20597245812 is an apocalyptic number.

20597245812 is a gapful number since it is divisible by the number (22) 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 20597245812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31794618240).

20597245812 is an abundant number, since it is smaller than the sum of its proper divisors (42991990668).

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

20597245812 is a wasteful number, since it uses less digits than its factorization.

20597245812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 20597245812 in words is "twenty billion, five hundred ninety-seven million, two hundred forty-five thousand, eight hundred twelve".