20455514421 has 4 divisors (see below), whose sum is σ = 27274019232. Its totient is φ = 13637009612.

The previous prime is 20455514407. The next prime is 20455514441. The reversal of 20455514421 is 12441555402.

It is a happy number.

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 20455514421 - 2⁵ = 20455514389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455514441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3409252401 + ... + 3409252406.

It is an arithmetic number, because the mean of its divisors is an integer number (6818504808).

Almost surely, 2^20455514421 is an apocalyptic number.

It is an amenable number.

20455514421 is a deficient number, since it is larger than the sum of its proper divisors (6818504811).

20455514421 is an equidigital number, since it uses as much as digits as its factorization.

20455514421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6818504810.

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 20455514421 in words is "twenty billion, four hundred fifty-five million, five hundred fourteen thousand, four hundred twenty-one".