19220445 has 24 divisors (see below), whose sum is σ = 33426432. Its totient is φ = 10216800.

The previous prime is 19220413. The next prime is 19220449. The reversal of 19220445 is 54402291.

It is not a de Polignac number, because 19220445 - 2⁵ = 19220413 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19220449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18900 + ... + 19890.

It is an arithmetic number, because the mean of its divisors is an integer number (1392768).

Almost surely, 2^19220445 is an apocalyptic number.

19220445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19220445 is a deficient number, since it is larger than the sum of its proper divisors (14205987).

19220445 is a wasteful number, since it uses less digits than its factorization.

19220445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 19220445 is about 4384.1127950818. The cubic root of 19220445 is about 267.8681918490.

The spelling of 19220445 in words is "nineteen million, two hundred twenty thousand, four hundred forty-five".