22021454405 has 4 divisors (see below), whose sum is σ = 26425745292. Its totient is φ = 17617163520.

The previous prime is 22021454387. The next prime is 22021454419. The reversal of 22021454405 is 50445412022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50445412022 = 2 ⋅25222706011.

It can be written as a sum of positive squares in 2 ways, for example, as 16213947556 + 5807506849 = 127334^2 + 76207^2 .

It is not a de Polignac number, because 22021454405 - 2⁸ = 22021454149 is a prime.

It is a super-3 number, since 3×22021454405³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202145436 + ... + 2202145445.

It is an arithmetic number, because the mean of its divisors is an integer number (6606436323).

Almost surely, 2^22021454405 is an apocalyptic number.

It is an amenable number.

22021454405 is a deficient number, since it is larger than the sum of its proper divisors (4404290887).

22021454405 is an equidigital number, since it uses as much as digits as its factorization.

22021454405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404290886.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 22021454405 its reverse (50445412022), we get a palindrome (72466866427).

The spelling of 22021454405 in words is "twenty-two billion, twenty-one million, four hundred fifty-four thousand, four hundred five".