19872546918 has 48 divisors (see below), whose sum is σ = 48667475520. Its totient is φ = 5379033744.

The previous prime is 19872546913. The next prime is 19872546973. The reversal of 19872546918 is 81964527891.

It is a super-2 number, since 2×19872546918² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19872546913) 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, 1773196 + ... + 1784367.

It is an arithmetic number, because the mean of its divisors is an integer number (1013905740).

Almost surely, 2^19872546918 is an apocalyptic number.

19872546918 is an abundant number, since it is smaller than the sum of its proper divisors (28794928602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19872546918 is a wasteful number, since it uses less digits than its factorization.

19872546918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557601 (or 3557594 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 60.

The spelling of 19872546918 in words is "nineteen billion, eight hundred seventy-two million, five hundred forty-six thousand, nine hundred eighteen".