18712455469 has 4 divisors (see below), whose sum is σ = 19147628896. Its totient is φ = 18277282044.

The previous prime is 18712455431. The next prime is 18712455479. The reversal of 18712455469 is 96455421781.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96455421781 = 194071 ⋅497011.

It is a cyclic number.

It is not a de Polignac number, because 18712455469 - 2¹⁹ = 18711931181 is a prime.

It is a super-2 number, since 2×18712455469² (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 (18712455479) 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, 217586649 + ... + 217586734.

It is an arithmetic number, because the mean of its divisors is an integer number (4786907224).

Almost surely, 2^18712455469 is an apocalyptic number.

It is an amenable number.

18712455469 is a deficient number, since it is larger than the sum of its proper divisors (435173427).

18712455469 is an equidigital number, since it uses as much as digits as its factorization.

18712455469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435173426.

The product of its digits is 2419200, while the sum is 52.

The spelling of 18712455469 in words is "eighteen billion, seven hundred twelve million, four hundred fifty-five thousand, four hundred sixty-nine".