20726251439 has 4 divisors (see below), whose sum is σ = 20726661480. Its totient is φ = 20725841400.

The previous prime is 20726251433. The next prime is 20726251451. The reversal of 20726251439 is 93415262702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93415262702 = 2 ⋅46707631351.

It is a cyclic number.

It is not a de Polignac number, because 20726251439 - 2¹² = 20726247343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20726251396 and 20726251405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726251433) 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, 116444 + ... + 234545.

It is an arithmetic number, because the mean of its divisors is an integer number (5181665370).

Almost surely, 2^20726251439 is an apocalyptic number.

20726251439 is a deficient number, since it is larger than the sum of its proper divisors (410041).

20726251439 is an equidigital number, since it uses as much as digits as its factorization.

20726251439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410040.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 20726251439 in words is "twenty billion, seven hundred twenty-six million, two hundred fifty-one thousand, four hundred thirty-nine".