20012050520 has 128 divisors (see below), whose sum is σ = 56182464000. Its totient is φ = 6232550400.

The previous prime is 20012050517. The next prime is 20012050537. The reversal of 20012050520 is 2505021002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6561956 + ... + 6565004.

It is an arithmetic number, because the mean of its divisors is an integer number (438925500).

Almost surely, 2^20012050520 is an apocalyptic number.

20012050520 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 20012050520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28091232000).

20012050520 is an abundant number, since it is smaller than the sum of its proper divisors (36170413480).

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

20012050520 is a wasteful number, since it uses less digits than its factorization.

20012050520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5209 (or 5205 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 20012050520 its reverse (2505021002), we get a palindrome (22517071522).

The spelling of 20012050520 in words is "twenty billion, twelve million, fifty thousand, five hundred twenty".