20327475247 has 4 divisors (see below), whose sum is σ = 20328537760. Its totient is φ = 20326412736.

The previous prime is 20327475241. The next prime is 20327475271. The reversal of 20327475247 is 74257472302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20327475247 is a prime.

It is a super-2 number, since 2×20327475247² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20327475241) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 502023 + ... + 541000.

It is an arithmetic number, because the mean of its divisors is an integer number (5082134440).

Almost surely, 2^20327475247 is an apocalyptic number.

20327475247 is a deficient number, since it is larger than the sum of its proper divisors (1062513).

20327475247 is a wasteful number, since it uses less digits than its factorization.

20327475247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062512.

The product of its (nonzero) digits is 658560, while the sum is 43.

The spelling of 20327475247 in words is "twenty billion, three hundred twenty-seven million, four hundred seventy-five thousand, two hundred forty-seven".