21554434414 has 8 divisors (see below), whose sum is σ = 32368269960. Its totient is φ = 10765011096.

The previous prime is 21554434409. The next prime is 21554434417. The reversal of 21554434414 is 41443445512.

21554434414 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21554434417) 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, 6100849 + ... + 6104380.

It is an arithmetic number, because the mean of its divisors is an integer number (4046033745).

Almost surely, 2^21554434414 is an apocalyptic number.

21554434414 is a deficient number, since it is larger than the sum of its proper divisors (10813835546).

21554434414 is a wasteful number, since it uses less digits than its factorization.

21554434414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12206114.

The product of its digits is 153600, while the sum is 37.

Adding to 21554434414 its reverse (41443445512), we get a palindrome (62997879926).

The spelling of 21554434414 in words is "twenty-one billion, five hundred fifty-four million, four hundred thirty-four thousand, four hundred fourteen".