22021430455 has 4 divisors (see below), whose sum is σ = 26425716552. Its totient is φ = 17617144360.

The previous prime is 22021430443. The next prime is 22021430527. The reversal of 22021430455 is 55403412022.

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

It is not a de Polignac number, because 22021430455 - 2¹⁵ = 22021397687 is a prime.

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, 2202143041 + ... + 2202143050.

It is an arithmetic number, because the mean of its divisors is an integer number (6606429138).

Almost surely, 2^22021430455 is an apocalyptic number.

22021430455 is a deficient number, since it is larger than the sum of its proper divisors (4404286097).

22021430455 is an equidigital number, since it uses as much as digits as its factorization.

22021430455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404286096.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 22021430455 its reverse (55403412022), we get a palindrome (77424842477).

The spelling of 22021430455 in words is "twenty-two billion, twenty-one million, four hundred thirty thousand, four hundred fifty-five".