19145253312 has 140 divisors (see below), whose sum is σ = 57531097536. Its totient is φ = 6294205440.

The previous prime is 19145253311. The next prime is 19145253313. The reversal of 19145253312 is 21335254191.

It is a happy number.

19145253312 is a `hidden beast` number, since 1 + 91 + 4 + 5 + 253 + 312 = 666.

It is an interprime number because it is at equal distance from previous prime (19145253311) and next prime (19145253313).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19145253311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 353137 + ... + 403727.

Almost surely, 2^19145253312 is an apocalyptic number.

19145253312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19145253312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28765548768).

19145253312 is an abundant number, since it is smaller than the sum of its proper divisors (38385844224).

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

19145253312 is an equidigital number, since it uses as much as digits as its factorization.

19145253312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50688 (or 50669 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The spelling of 19145253312 in words is "nineteen billion, one hundred forty-five million, two hundred fifty-three thousand, three hundred twelve".