19751272448 has 128 divisors (see below), whose sum is σ = 41900457600. Its totient is φ = 9290907648.

The previous prime is 19751272439. The next prime is 19751272459. The reversal of 19751272448 is 84427215791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×19751272448² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19751272396 and 19751272405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55017293 + ... + 55017651.

It is an arithmetic number, because the mean of its divisors is an integer number (327347325).

Almost surely, 2^19751272448 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 19751272448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20950228800).

19751272448 is an abundant number, since it is smaller than the sum of its proper divisors (22149185152).

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

19751272448 is an frugal number, since it uses more digits than its factorization.

19751272448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 457 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The spelling of 19751272448 in words is "nineteen billion, seven hundred fifty-one million, two hundred seventy-two thousand, four hundred forty-eight".