20338626517 has 4 divisors (see below), whose sum is σ = 22187592576. Its totient is φ = 18489660460.

The previous prime is 20338626491. The next prime is 20338626547. The reversal of 20338626517 is 71562683302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20338626517 - 2¹¹ = 20338624469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338626547) 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, 924483013 + ... + 924483034.

It is an arithmetic number, because the mean of its divisors is an integer number (5546898144).

Almost surely, 2^20338626517 is an apocalyptic number.

It is an amenable number.

20338626517 is a deficient number, since it is larger than the sum of its proper divisors (1848966059).

20338626517 is a wasteful number, since it uses less digits than its factorization.

20338626517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848966058.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 20338626517 in words is "twenty billion, three hundred thirty-eight million, six hundred twenty-six thousand, five hundred seventeen".