20512240000 has 160 divisors (see below), whose sum is σ = 58360381200. Its totient is φ = 7032576000.

The previous prime is 20512239977. The next prime is 20512240013. The reversal of 20512240000 is 4221502.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 541686 + ... + 578314.

Almost surely, 2^20512240000 is an apocalyptic number.

20512240000 is a gapful number since it is divisible by the number (20) 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 20512240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29180190600).

20512240000 is an abundant number, since it is smaller than the sum of its proper divisors (37848141200).

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

20512240000 is an frugal number, since it uses more digits than its factorization.

20512240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36670 (or 36643 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

Adding to 20512240000 its reverse (4221502), we get a palindrome (20516461502).

The spelling of 20512240000 in words is "twenty billion, five hundred twelve million, two hundred forty thousand".