20825648438567 has 4 divisors (see below), whose sum is σ = 23800741072656. Its totient is φ = 17850555804480.

The previous prime is 20825648438527. The next prime is 20825648438591. The reversal of 20825648438567 is 76583484652802.

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

It is not a de Polignac number, because 20825648438567 - 2¹⁰ = 20825648437543 is a prime.

It is a super-3 number, since 3×20825648438567³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20825648438497 and 20825648438506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825648438527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1487546317034 + ... + 1487546317047.

It is an arithmetic number, because the mean of its divisors is an integer number (5950185268164).

Almost surely, 2^{20825648438567} is an apocalyptic number.

20825648438567 is a deficient number, since it is larger than the sum of its proper divisors (2975092634089).

20825648438567 is an equidigital number, since it uses as much as digits as its factorization.

20825648438567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975092634088.

The product of its (nonzero) digits is 619315200, while the sum is 68.

The spelling of 20825648438567 in words is "twenty trillion, eight hundred twenty-five billion, six hundred forty-eight million, four hundred thirty-eight thousand, five hundred sixty-seven".