20287617675 has 72 divisors (see below), whose sum is σ = 38457766224. Its totient is φ = 9400135680.

The previous prime is 20287617643. The next prime is 20287617731. The reversal of 20287617675 is 57671678202.

It is not a de Polignac number, because 20287617675 - 2⁵ = 20287617643 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 168399 + ... + 262551.

It is an arithmetic number, because the mean of its divisors is an integer number (534135642).

Almost surely, 2^20287617675 is an apocalyptic number.

20287617675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20287617675 is a deficient number, since it is larger than the sum of its proper divisors (18170148549).

20287617675 is a wasteful number, since it uses less digits than its factorization.

20287617675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94209 (or 94191 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 20287617675 in words is "twenty billion, two hundred eighty-seven million, six hundred seventeen thousand, six hundred seventy-five".