20750388644466 has 112 divisors (see below), whose sum is σ = 50576911812504. Its totient is φ = 6344066956032.

The previous prime is 20750388644459. The next prime is 20750388644473. The reversal of 20750388644466 is 66444688305702.

20750388644466 is a `hidden beast` number, since 2 + 0 + 7 + 50 + 3 + 8 + 86 + 44 + 466 = 666.

It is an interprime number because it is at equal distance from previous prime (20750388644459) and next prime (20750388644473).

It can be written as a sum of positive squares in 4 ways, for example, as 9373792572225 + 11376596072241 = 3061665^2 + 3372921^2 .

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 510771 + ... + 6462326.

Almost surely, 2^{20750388644466} is an apocalyptic number.

20750388644466 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20750388644466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25288455906252).

20750388644466 is an abundant number, since it is smaller than the sum of its proper divisors (29826523168038).

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

20750388644466 is a wasteful number, since it uses less digits than its factorization.

20750388644466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973287 (or 6973272 counting only the distinct ones).

The product of its (nonzero) digits is 185794560, while the sum is 63.

The spelling of 20750388644466 in words is "twenty trillion, seven hundred fifty billion, three hundred eighty-eight million, six hundred forty-four thousand, four hundred sixty-six".