20525243430066 has 32 divisors (see below), whose sum is σ = 41241245472000. Its totient is φ = 6810002847360.

The previous prime is 20525243430059. The next prime is 20525243430071. The reversal of 20525243430066 is 66003434252502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4311081 + ... + 7722428.

It is an arithmetic number, because the mean of its divisors is an integer number (1288788921000).

Almost surely, 2^{20525243430066} is an apocalyptic number.

20525243430066 is an abundant number, since it is smaller than the sum of its proper divisors (20716002041934).

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

20525243430066 is a wasteful number, since it uses less digits than its factorization.

20525243430066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12034834.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 20525243430066 its reverse (66003434252502), we get a palindrome (86528677682568).

The spelling of 20525243430066 in words is "twenty trillion, five hundred twenty-five billion, two hundred forty-three million, four hundred thirty thousand, sixty-six".