20824718975 has 12 divisors (see below), whose sum is σ = 26452473600. Its totient is φ = 16253438400.

The previous prime is 20824718963. The next prime is 20824718977. The reversal of 20824718975 is 57981742802.

It is not a de Polignac number, because 20824718975 - 2¹⁰ = 20824717951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824718977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10157375 + ... + 10159424.

It is an arithmetic number, because the mean of its divisors is an integer number (2204372800).

Almost surely, 2^20824718975 is an apocalyptic number.

20824718975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20824718975 is a deficient number, since it is larger than the sum of its proper divisors (5627754625).

20824718975 is a wasteful number, since it uses less digits than its factorization.

20824718975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20316850 (or 20316845 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 20824718975 in words is "twenty billion, eight hundred twenty-four million, seven hundred eighteen thousand, nine hundred seventy-five".