19974773560 has 192 divisors, whose sum is σ = 56405704320. Its totient is φ = 6323466240.

The previous prime is 19974773513. The next prime is 19974773561. The reversal of 19974773560 is 6537747991.

It is a junction number, because it is equal to n+sod(n) for n = 19974773495 and 19974773504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19974773561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1760305 + ... + 1771615.

It is an arithmetic number, because the mean of its divisors is an integer number (293779710).

Almost surely, 2^19974773560 is an apocalyptic number.

19974773560 is a gapful number since it is divisible by the number (10) 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 19974773560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28202852160).

19974773560 is an abundant number, since it is smaller than the sum of its proper divisors (36430930760).

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

19974773560 is a wasteful number, since it uses less digits than its factorization.

19974773560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406 (or 11395 counting only the distinct ones).

The product of its (nonzero) digits is 10001880, while the sum is 58.

The spelling of 19974773560 in words is "nineteen billion, nine hundred seventy-four million, seven hundred seventy-three thousand, five hundred sixty".