19406539107 has 12 divisors (see below), whose sum is σ = 28199524080. Its totient is φ = 12860220528.

The previous prime is 19406539099. The next prime is 19406539123. The reversal of 19406539107 is 70193560491.

19406539107 is a `hidden beast` number, since 1 + 9 + 4 + 0 + 6 + 539 + 107 = 666.

It is not a de Polignac number, because 19406539107 - 2³ = 19406539099 is a prime.

It is a super-2 number, since 2×19406539107² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19406539157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6454432 + ... + 6457437.

It is an arithmetic number, because the mean of its divisors is an integer number (2349960340).

Almost surely, 2^19406539107 is an apocalyptic number.

19406539107 is a deficient number, since it is larger than the sum of its proper divisors (8792984973).

19406539107 is a wasteful number, since it uses less digits than its factorization.

19406539107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12912042 (or 12912039 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 19406539107 in words is "nineteen billion, four hundred six million, five hundred thirty-nine thousand, one hundred seven".