22389491421 has 32 divisors (see below), whose sum is σ = 37026570240. Its totient is φ = 13253814000.

The previous prime is 22389491401. The next prime is 22389491471. The reversal of 22389491421 is 12419498322.

22389491421 is a `hidden beast` number, since 22 + 38 + 94 + 91 + 421 = 666.

It is not a de Polignac number, because 22389491421 - 2⁵ = 22389491389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22389491401) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 863805 + ... + 889346.

It is an arithmetic number, because the mean of its divisors is an integer number (1157080320).

Almost surely, 2^22389491421 is an apocalyptic number.

It is an amenable number.

22389491421 is a deficient number, since it is larger than the sum of its proper divisors (14637078819).

22389491421 is a wasteful number, since it uses less digits than its factorization.

22389491421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753214 (or 1753208 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 22389491421 in words is "twenty-two billion, three hundred eighty-nine million, four hundred ninety-one thousand, four hundred twenty-one".