22028461921 has 8 divisors (see below), whose sum is σ = 22464501120. Its totient is φ = 21593178672.

The previous prime is 22028461901. The next prime is 22028461963. The reversal of 22028461921 is 12916482022.

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

It is a cyclic number.

It is not a de Polignac number, because 22028461921 - 2¹³ = 22028453729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22028461901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129951 + ... + 246868.

It is an arithmetic number, because the mean of its divisors is an integer number (2808062640).

Almost surely, 2^22028461921 is an apocalyptic number.

It is an amenable number.

22028461921 is a deficient number, since it is larger than the sum of its proper divisors (436039199).

22028461921 is a wasteful number, since it uses less digits than its factorization.

22028461921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377975.

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 22028461921 in words is "twenty-two billion, twenty-eight million, four hundred sixty-one thousand, nine hundred twenty-one".