19773895680 has 528 divisors, whose sum is σ = 85437915264. Its totient is φ = 4108124160.

The previous prime is 19773895679. The next prime is 19773895697. The reversal of 19773895680 is 8659837791.

19773895680 is a `hidden beast` number, since 197 + 7 + 389 + 5 + 68 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (528).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3545374 + ... + 3550946.

Almost surely, 2^19773895680 is an apocalyptic number.

19773895680 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 19773895680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42718957632).

19773895680 is an abundant number, since it is smaller than the sum of its proper divisors (65664019584).

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

19773895680 is a wasteful number, since it uses less digits than its factorization.

19773895680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622 (or 5601 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 19773895680 in words is "nineteen billion, seven hundred seventy-three million, eight hundred ninety-five thousand, six hundred eighty".