19006895645 has 24 divisors (see below), whose sum is σ = 24744455424. Its totient is φ = 14006533376.

The previous prime is 19006895639. The next prime is 19006895657. The reversal of 19006895645 is 54659860091.

It is a happy number.

It is not a de Polignac number, because 19006895645 - 2⁶ = 19006895581 is a prime.

It is a super-2 number, since 2×19006895645² (a number of 21 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 72017 + ... + 207846.

It is an arithmetic number, because the mean of its divisors is an integer number (1031018976).

Almost surely, 2^19006895645 is an apocalyptic number.

It is an amenable number.

19006895645 is a deficient number, since it is larger than the sum of its proper divisors (5737559779).

19006895645 is a wasteful number, since it uses less digits than its factorization.

19006895645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279949 (or 279932 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 19006895645 in words is "nineteen billion, six million, eight hundred ninety-five thousand, six hundred forty-five".