20221440405 has 8 divisors (see below), whose sum is σ = 32354304672. Its totient is φ = 10784768208.

The previous prime is 20221440397. The next prime is 20221440413. The reversal of 20221440405 is 50404412202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20221440397) and next prime (20221440413).

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

It is not a de Polignac number, because 20221440405 - 2³ = 20221440397 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 674047999 + ... + 674048028.

It is an arithmetic number, because the mean of its divisors is an integer number (4044288084).

Almost surely, 2^20221440405 is an apocalyptic number.

It is an amenable number.

20221440405 is a deficient number, since it is larger than the sum of its proper divisors (12132864267).

20221440405 is a wasteful number, since it uses less digits than its factorization.

20221440405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348096035.

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 20221440405 its reverse (50404412202), we get a palindrome (70625852607).

The spelling of 20221440405 in words is "twenty billion, two hundred twenty-one million, four hundred forty thousand, four hundred five".