21909225341 has 4 divisors (see below), whose sum is σ = 22664715900. Its totient is φ = 21153734784.

The previous prime is 21909225287. The next prime is 21909225389. The reversal of 21909225341 is 14352290912.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7926162841 + 13983062500 = 89029^2 + 118250^2 .

It is a cyclic number.

It is not a de Polignac number, because 21909225341 - 2²² = 21905031037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21909225295 and 21909225304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21909225941) 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, 377745236 + ... + 377745293.

It is an arithmetic number, because the mean of its divisors is an integer number (5666178975).

Almost surely, 2^21909225341 is an apocalyptic number.

It is an amenable number.

21909225341 is a deficient number, since it is larger than the sum of its proper divisors (755490559).

21909225341 is an equidigital number, since it uses as much as digits as its factorization.

21909225341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755490558.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 21909225341 in words is "twenty-one billion, nine hundred nine million, two hundred twenty-five thousand, three hundred forty-one".