19253889040 has 20 divisors (see below), whose sum is σ = 44765292204. Its totient is φ = 7701555584.

The previous prime is 19253889029. The next prime is 19253889043. The reversal of 19253889040 is 4098835291.

It can be written as a sum of positive squares in 2 ways, for example, as 2367406336 + 16886482704 = 48656^2 + 129948^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (19253889043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120336727 + ... + 120336886.

Almost surely, 2^19253889040 is an apocalyptic number.

19253889040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19253889040 is an abundant number, since it is smaller than the sum of its proper divisors (25511403164).

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

19253889040 is a wasteful number, since it uses less digits than its factorization.

19253889040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240673626 (or 240673620 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 19253889040 in words is "nineteen billion, two hundred fifty-three million, eight hundred eighty-nine thousand, forty".