20051305232240 has 80 divisors (see below), whose sum is σ = 47385253789536. Its totient is φ = 7888752000000.

The previous prime is 20051305232131. The next prime is 20051305232323. The reversal of 20051305232240 is 4223250315002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178175990 + ... + 178288490.

Almost surely, 2^{20051305232240} is an apocalyptic number.

20051305232240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20051305232240 is an abundant number, since it is smaller than the sum of its proper divisors (27333948557296).

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

20051305232240 is a wasteful number, since it uses less digits than its factorization.

20051305232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149098 (or 149092 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20051305232240 its reverse (4223250315002), we get a palindrome (24274555547242).

The spelling of 20051305232240 in words is "twenty trillion, fifty-one billion, three hundred five million, two hundred thirty-two thousand, two hundred forty".