20001250520 has 32 divisors (see below), whose sum is σ = 45045324720. Its totient is φ = 7992942720.

The previous prime is 20001250519. The next prime is 20001250537. The reversal of 20001250520 is 2505210002.

It is a congruent number.

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, 193202 + ... + 278081.

Almost surely, 2^20001250520 is an apocalyptic number.

20001250520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001250520 is an abundant number, since it is smaller than the sum of its proper divisors (25044074200).

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

20001250520 is a wasteful number, since it uses less digits than its factorization.

20001250520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472355 (or 472351 counting only the distinct ones).

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

Adding to 20001250520 its reverse (2505210002), we get a palindrome (22506460522).

The spelling of 20001250520 in words is "twenty billion, one million, two hundred fifty thousand, five hundred twenty".