20173638469 has 8 divisors (see below), whose sum is σ = 20805340160. Its totient is φ = 19549325376.

The previous prime is 20173638389. The next prime is 20173638479. The reversal of 20173638469 is 96483637102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20173638469 - 2¹⁵ = 20173605701 is a prime.

It is a super-2 number, since 2×20173638469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173638479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1841604 + ... + 1852525.

It is an arithmetic number, because the mean of its divisors is an integer number (2600667520).

Almost surely, 2^20173638469 is an apocalyptic number.

It is an amenable number.

20173638469 is a deficient number, since it is larger than the sum of its proper divisors (631701691).

20173638469 is a wasteful number, since it uses less digits than its factorization.

20173638469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694299.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 20173638469 in words is "twenty billion, one hundred seventy-three million, six hundred thirty-eight thousand, four hundred sixty-nine".