19739417472 has 160 divisors (see below), whose sum is σ = 60770773800. Its totient is φ = 6352819200.

The previous prime is 19739417449. The next prime is 19739417479. The reversal of 19739417472 is 27471493791.

It is a happy number.

19739417472 is a `hidden beast` number, since 1 + 9 + 73 + 94 + 17 + 472 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19739417479) 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, 267847 + ... + 333497.

Almost surely, 2^19739417472 is an apocalyptic number.

19739417472 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 19739417472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30385386900).

19739417472 is an abundant number, since it is smaller than the sum of its proper divisors (41031356328).

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

19739417472 is an equidigital number, since it uses as much as digits as its factorization.

19739417472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65706 (or 65685 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The spelling of 19739417472 in words is "nineteen billion, seven hundred thirty-nine million, four hundred seventeen thousand, four hundred seventy-two".