19258209408 has 64 divisors (see below), whose sum is σ = 51270544800. Its totient is φ = 6404855808.

The previous prime is 19258209401. The next prime is 19258209413. The reversal of 19258209408 is 80490285291.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (19258209401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113508 + ... + 226716.

Almost surely, 2^19258209408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19258209408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25635272400).

19258209408 is an abundant number, since it is smaller than the sum of its proper divisors (32012335392).

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

19258209408 is a wasteful number, since it uses less digits than its factorization.

19258209408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113669 (or 113657 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 19258209408 in words is "nineteen billion, two hundred fifty-eight million, two hundred nine thousand, four hundred eight".