19378108458 has 48 divisors (see below), whose sum is σ = 42512136576. Its totient is φ = 6378704640.

The previous prime is 19378108447. The next prime is 19378108483. The reversal of 19378108458 is 85480187391.

19378108458 is a `hidden beast` number, since 19 + 3 + 78 + 108 + 458 = 666.

It is a super-2 number, since 2×19378108458² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 796413 + ... + 820383.

It is an arithmetic number, because the mean of its divisors is an integer number (885669512).

Almost surely, 2^19378108458 is an apocalyptic number.

19378108458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19378108458 is an abundant number, since it is smaller than the sum of its proper divisors (23134028118).

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

19378108458 is a wasteful number, since it uses less digits than its factorization.

19378108458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24539 (or 24536 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 19378108458 in words is "nineteen billion, three hundred seventy-eight million, one hundred eight thousand, four hundred fifty-eight".