20217880304 has 20 divisors (see below), whose sum is σ = 39344714664. Its totient is φ = 10064405568.

The previous prime is 20217880303. The next prime is 20217880339. The reversal of 20217880304 is 40308871202.

It is a super-2 number, since 2×20217880304² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20217880303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779667 + ... + 2786930.

Almost surely, 2^20217880304 is an apocalyptic number.

It is an amenable number.

20217880304 is a deficient number, since it is larger than the sum of its proper divisors (19126834360).

20217880304 is a wasteful number, since it uses less digits than its factorization.

20217880304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566832 (or 5566826 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 20217880304 in words is "twenty billion, two hundred seventeen million, eight hundred eighty thousand, three hundred four".