42019668945 has 40 divisors (see below), whose sum is σ = 75917343744. Its totient is φ = 22234002336.

The previous prime is 42019668941. The next prime is 42019668947. The reversal of 42019668945 is 54986691024.

It is not a de Polignac number, because 42019668945 - 2² = 42019668941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42019668891 and 42019668900.

It is not an unprimeable number, because it can be changed into a prime (42019668941) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 357039 + ... + 459908.

Almost surely, 2^42019668945 is an apocalyptic number.

42019668945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42019668945 is a deficient number, since it is larger than the sum of its proper divisors (33897674799).

42019668945 is a wasteful number, since it uses less digits than its factorization.

42019668945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817091 (or 817082 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 42019668945 in words is "forty-two billion, nineteen million, six hundred sixty-eight thousand, nine hundred forty-five".