20512238472 has 576 divisors, whose sum is σ = 68319014400. Its totient is φ = 5748019200.

The previous prime is 20512238447. The next prime is 20512238473. The reversal of 20512238472 is 27483221502.

20512238472 is a `hidden beast` number, since 205 + 1 + 2 + 2 + 384 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512238473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 211466328 + ... + 211466424.

It is an arithmetic number, because the mean of its divisors is an integer number (118609400).

Almost surely, 2^20512238472 is an apocalyptic number.

20512238472 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 20512238472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34159507200).

20512238472 is an abundant number, since it is smaller than the sum of its proper divisors (47806775928).

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

20512238472 is a wasteful number, since it uses less digits than its factorization.

20512238472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

Adding to 20512238472 its reverse (27483221502), we get a palindrome (47995459974).

The spelling of 20512238472 in words is "twenty billion, five hundred twelve million, two hundred thirty-eight thousand, four hundred seventy-two".