19345445 has 18 divisors (see below), whose sum is σ = 27101106. Its totient is φ = 13218240.

The previous prime is 19345423. The next prime is 19345453. The reversal of 19345445 is 54454391.

It can be written as a sum of positive squares in 3 ways, for example, as 4468996 + 14876449 = 2114^2 + 3857^2 .

It is not a de Polignac number, because 19345445 - 2⁸ = 19345189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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 17 ways as a sum of consecutive naturals, for example, 68705 + ... + 68985.

It is an arithmetic number, because the mean of its divisors is an integer number (1505617).

Almost surely, 2^19345445 is an apocalyptic number.

It is an amenable number.

19345445 is a deficient number, since it is larger than the sum of its proper divisors (7755661).

19345445 is an frugal number, since it uses more digits than its factorization.

19345445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 293 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 19345445 is about 4398.3457117421. The cubic root of 19345445 is about 268.4476303671.

The spelling of 19345445 in words is "nineteen million, three hundred forty-five thousand, four hundred forty-five".