20436357469 has 4 divisors (see below), whose sum is σ = 22294208160. Its totient is φ = 18578506780.

The previous prime is 20436357467. The next prime is 20436357521. The reversal of 20436357469 is 96475363402.

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 20436357469 - 2¹ = 20436357467 is a prime.

It is a super-2 number, since 2×20436357469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20436357467) 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, 928925329 + ... + 928925350.

It is an arithmetic number, because the mean of its divisors is an integer number (5573552040).

Almost surely, 2^20436357469 is an apocalyptic number.

It is an amenable number.

20436357469 is a deficient number, since it is larger than the sum of its proper divisors (1857850691).

20436357469 is a wasteful number, since it uses less digits than its factorization.

20436357469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857850690.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 20436357469 in words is "twenty billion, four hundred thirty-six million, three hundred fifty-seven thousand, four hundred sixty-nine".