20516350432501 has 32 divisors (see below), whose sum is σ = 25613825080320. Its totient is φ = 15964904716800.

The previous prime is 20516350432493. The next prime is 20516350432537. The reversal of 20516350432501 is 10523405361502.

It is a cyclic number.

It is not a de Polignac number, because 20516350432501 - 2³ = 20516350432493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516350432801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208426986 + ... + 208525396.

It is an arithmetic number, because the mean of its divisors is an integer number (800432033760).

Almost surely, 2^{20516350432501} is an apocalyptic number.

It is an amenable number.

20516350432501 is a deficient number, since it is larger than the sum of its proper divisors (5097474647819).

20516350432501 is a wasteful number, since it uses less digits than its factorization.

20516350432501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102105.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20516350432501 in words is "twenty trillion, five hundred sixteen billion, three hundred fifty million, four hundred thirty-two thousand, five hundred one".