19431519948 has 60 divisors (see below), whose sum is σ = 52549506240. Its totient is φ = 6253819488.

The previous prime is 19431519931. The next prime is 19431519949. The reversal of 19431519948 is 84991513491.

It is a happy number.

19431519948 is a `hidden beast` number, since 1 + 9 + 4 + 31 + 519 + 94 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 19431519894 and 19431519903.

It is not an unprimeable number, because it can be changed into a prime (19431519949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1024636 + ... + 1043427.

It is an arithmetic number, because the mean of its divisors is an integer number (875825104).

Almost surely, 2^19431519948 is an apocalyptic number.

19431519948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19431519948 is an abundant number, since it is smaller than the sum of its proper divisors (33117986292).

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

19431519948 is a wasteful number, since it uses less digits than its factorization.

19431519948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068108 (or 2068097 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 19431519948 in words is "nineteen billion, four hundred thirty-one million, five hundred nineteen thousand, nine hundred forty-eight".