20363647806 has 16 divisors (see below), whose sum is σ = 45252550800. Its totient is φ = 6787882584.

The previous prime is 20363647763. The next prime is 20363647859. The reversal of 20363647806 is 60874636302.

20363647806 is a `hidden beast` number, since 2 + 0 + 3 + 636 + 4 + 7 + 8 + 0 + 6 = 666.

It is a super-3 number, since 3×20363647806³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 188552241 + ... + 188552348.

It is an arithmetic number, because the mean of its divisors is an integer number (2828284425).

Almost surely, 2^20363647806 is an apocalyptic number.

20363647806 is an abundant number, since it is smaller than the sum of its proper divisors (24888902994).

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

20363647806 is a wasteful number, since it uses less digits than its factorization.

20363647806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377104600 (or 377104594 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 20363647806 in words is "twenty billion, three hundred sixty-three million, six hundred forty-seven thousand, eight hundred six".