22391820445 has 16 divisors (see below), whose sum is σ = 27150963840. Its totient is φ = 17726526144.

The previous prime is 22391820443. The next prime is 22391820461. The reversal of 22391820445 is 54402819322.

It is a cyclic number.

It is not a de Polignac number, because 22391820445 - 2¹ = 22391820443 is a prime.

It is a super-2 number, since 2×22391820445² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22391820398 and 22391820407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22391820443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719671 + ... + 750139.

It is an arithmetic number, because the mean of its divisors is an integer number (1696935240).

Almost surely, 2^22391820445 is an apocalyptic number.

It is an amenable number.

22391820445 is a deficient number, since it is larger than the sum of its proper divisors (4759143395).

22391820445 is a wasteful number, since it uses less digits than its factorization.

22391820445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32004.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 22391820445 in words is "twenty-two billion, three hundred ninety-one million, eight hundred twenty thousand, four hundred forty-five".