21480423469 has 4 divisors (see below), whose sum is σ = 21488872896. Its totient is φ = 21471974044.

The previous prime is 21480423467. The next prime is 21480423479. The reversal of 21480423469 is 96432408412.

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 21480423469 - 2¹ = 21480423467 is a prime.

It is a super-2 number, since 2×21480423469² (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 (21480423467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4220899 + ... + 4225984.

It is an arithmetic number, because the mean of its divisors is an integer number (5372218224).

Almost surely, 2^21480423469 is an apocalyptic number.

It is an amenable number.

21480423469 is a deficient number, since it is larger than the sum of its proper divisors (8449427).

21480423469 is an equidigital number, since it uses as much as digits as its factorization.

21480423469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8449426.

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 21480423469 in words is "twenty-one billion, four hundred eighty million, four hundred twenty-three thousand, four hundred sixty-nine".