20426007639 has 16 divisors (see below), whose sum is σ = 28223913600. Its totient is φ = 13124390496.

The previous prime is 20426007631. The next prime is 20426007649. The reversal of 20426007639 is 93670062402.

It is not a de Polignac number, because 20426007639 - 2³ = 20426007631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20426007597 and 20426007606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426007631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159529 + ... + 257490.

It is an arithmetic number, because the mean of its divisors is an integer number (1763994600).

Almost surely, 2^20426007639 is an apocalyptic number.

20426007639 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20426007639 is a deficient number, since it is larger than the sum of its proper divisors (7797905961).

20426007639 is a wasteful number, since it uses less digits than its factorization.

20426007639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417614.

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 20426007639 in words is "twenty billion, four hundred twenty-six million, seven thousand, six hundred thirty-nine".