20145999799296 has 396 divisors, whose sum is σ = 69497582236992. Its totient is φ = 5505729748992.

The previous prime is 20145999799253. The next prime is 20145999799307. The reversal of 20145999799296 is 69299799954102.

20145999799296 is a `hidden beast` number, since 2 + 0 + 1 + 459 + 9 + 9 + 79 + 9 + 2 + 96 = 666.

It is a super-2 number, since 2×20145999799296² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33831685 + ... + 34422011.

Almost surely, 2^{20145999799296} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20145999799296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34748791118496).

20145999799296 is an abundant number, since it is smaller than the sum of its proper divisors (49351582437696).

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

20145999799296 is a wasteful number, since it uses less digits than its factorization.

20145999799296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590406 (or 590362 counting only the distinct ones).

The product of its (nonzero) digits is 1785641760, while the sum is 81.

The spelling of 20145999799296 in words is "twenty trillion, one hundred forty-five billion, nine hundred ninety-nine million, seven hundred ninety-nine thousand, two hundred ninety-six".