20669708036250 has 720 divisors, whose sum is σ = 71431009866216. Its totient is φ = 4278718080000.

The previous prime is 20669708036239. The next prime is 20669708036279. The reversal of 20669708036250 is 5263080796602.

20669708036250 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 9 + 7 + 0 + 8 + 0 + 3 + 625 + 0 = 666.

It can be written as a sum of positive squares in 20 ways, for example, as 5330571292809 + 15339136743441 = 2308803^2 + 3916521^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 379784040 + ... + 379838460.

Almost surely, 2^{20669708036250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20669708036250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35715504933108).

20669708036250 is an abundant number, since it is smaller than the sum of its proper divisors (50761301829966).

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

20669708036250 is a wasteful number, since it uses less digits than its factorization.

20669708036250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54529 (or 54504 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 20669708036250 in words is "twenty trillion, six hundred sixty-nine billion, seven hundred eight million, thirty-six thousand, two hundred fifty".