19006445445 has 16 divisors (see below), whose sum is σ = 32749567872. Its totient is φ = 9357019200.

The previous prime is 19006445429. The next prime is 19006445449. The reversal of 19006445445 is 54454460091.

It is not a de Polignac number, because 19006445445 - 2⁴ = 19006445429 is a prime.

It is a super-2 number, since 2×19006445445² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19006445397 and 19006445406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19006445449) 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, 48734281 + ... + 48734670.

It is an arithmetic number, because the mean of its divisors is an integer number (2046847992).

Almost surely, 2^19006445445 is an apocalyptic number.

19006445445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19006445445 is a deficient number, since it is larger than the sum of its proper divisors (13743122427).

19006445445 is a wasteful number, since it uses less digits than its factorization.

19006445445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97468972.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 19006445445 in words is "nineteen billion, six million, four hundred forty-five thousand, four hundred forty-five".