19451496144 has 80 divisors (see below), whose sum is σ = 51650569152. Its totient is φ = 6303366144.

The previous prime is 19451496143. The next prime is 19451496161. The reversal of 19451496144 is 44169415491.

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

It is a junction number, because it is equal to n+sod(n) for n = 19451496093 and 19451496102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19451496143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2541187 + ... + 2548829.

Almost surely, 2^19451496144 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 19451496144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25825284576).

19451496144 is an abundant number, since it is smaller than the sum of its proper divisors (32199073008).

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

19451496144 is a wasteful number, since it uses less digits than its factorization.

19451496144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124 (or 9118 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The spelling of 19451496144 in words is "nineteen billion, four hundred fifty-one million, four hundred ninety-six thousand, one hundred forty-four".