20745312532236 has 72 divisors (see below), whose sum is σ = 52493203460880. Its totient is φ = 6908029075584.

The previous prime is 20745312532187. The next prime is 20745312532253. The reversal of 20745312532236 is 63223521354702.

20745312532236 is a `hidden beast` number, since 2 + 0 + 7 + 4 + 5 + 312 + 5 + 322 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20745312532191 and 20745312532200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 455587726 + ... + 455633258.

It is an arithmetic number, because the mean of its divisors is an integer number (729072270290).

Almost surely, 2^{20745312532236} is an apocalyptic number.

It is an amenable number.

20745312532236 is an abundant number, since it is smaller than the sum of its proper divisors (31747890928644).

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

20745312532236 is a wasteful number, since it uses less digits than its factorization.

20745312532236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58215 (or 58210 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 45.

Adding to 20745312532236 its reverse (63223521354702), we get a palindrome (83968833886938).

The spelling of 20745312532236 in words is "twenty trillion, seven hundred forty-five billion, three hundred twelve million, five hundred thirty-two thousand, two hundred thirty-six".