20599963493760 has 672 divisors, whose sum is σ = 85891423172400. Its totient is φ = 4708557858816.

The previous prime is 20599963493731. The next prime is 20599963493761. The reversal of 20599963493760 is 6739436999502.

20599963493760 is a `hidden beast` number, since 2 + 0 + 5 + 9 + 9 + 9 + 63 + 493 + 76 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20599963493761) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 22410901 + ... + 23311979.

Almost surely, 2^{20599963493760} is an apocalyptic number.

20599963493760 is a gapful number since it is divisible by the number (20) 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 20599963493760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42945711586200).

20599963493760 is an abundant number, since it is smaller than the sum of its proper divisors (65291459678640).

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

20599963493760 is an frugal number, since it uses more digits than its factorization.

20599963493760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901130 (or 901096 counting only the distinct ones).

The product of its (nonzero) digits is 595213920, while the sum is 72.

The spelling of 20599963493760 in words is "twenty trillion, five hundred ninety-nine billion, nine hundred sixty-three million, four hundred ninety-three thousand, seven hundred sixty".