20545315012530 has 192 divisors, whose sum is σ = 66726191121408. Its totient is φ = 4260992791680.

The previous prime is 20545315012499. The next prime is 20545315012571. The reversal of 20545315012530 is 3521051354502.

20545315012530 is a `hidden beast` number, since 2 + 0 + 5 + 45 + 31 + 50 + 1 + 2 + 530 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 790077 + ... + 6458703.

It is an arithmetic number, because the mean of its divisors is an integer number (347532245424).

Almost surely, 2^{20545315012530} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20545315012530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33363095560704).

20545315012530 is an abundant number, since it is smaller than the sum of its proper divisors (46180876108878).

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

20545315012530 is a wasteful number, since it uses less digits than its factorization.

20545315012530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669181 (or 5669178 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 20545315012530 in words is "twenty trillion, five hundred forty-five billion, three hundred fifteen million, twelve thousand, five hundred thirty".