20512112004521 has 8 divisors (see below), whose sum is σ = 20854515024000. Its totient is φ = 20171777886000.

The previous prime is 20512112004511. The next prime is 20512112004569. The reversal of 20512112004521 is 12540021121502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20512112004521 - 2⁴² = 16114065493417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20512112004511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517205246 + ... + 517244903.

It is an arithmetic number, because the mean of its divisors is an integer number (2606814378000).

Almost surely, 2^{20512112004521} is an apocalyptic number.

It is an amenable number.

20512112004521 is a deficient number, since it is larger than the sum of its proper divisors (342403019479).

20512112004521 is a wasteful number, since it uses less digits than its factorization.

20512112004521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034450479.

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 20512112004521 in words is "twenty trillion, five hundred twelve billion, one hundred twelve million, four thousand, five hundred twenty-one".