19454392008 has 24 divisors (see below), whose sum is σ = 52688978550. Its totient is φ = 6484797312.

The previous prime is 19454391997. The next prime is 19454392019. The reversal of 19454392008 is 80029345491.

19454392008 is a `hidden beast` number, since 1 + 9 + 4 + 5 + 439 + 200 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (19454391997) and next prime (19454392019).

It can be written as a sum of positive squares in only one way, i.e., 15257684484 + 4196707524 = 123522^2 + 64782^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135099873 + ... + 135100016.

Almost surely, 2^19454392008 is an apocalyptic number.

19454392008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19454392008 is an abundant number, since it is smaller than the sum of its proper divisors (33234586542).

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

19454392008 is a wasteful number, since it uses less digits than its factorization.

19454392008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270199901 (or 270199894 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 19454392008 in words is "nineteen billion, four hundred fifty-four million, three hundred ninety-two thousand, eight".