20413436663666 has 16 divisors (see below), whose sum is σ = 31051878519168. Its totient is φ = 10062814692000.

The previous prime is 20413436663579. The next prime is 20413436663671. The reversal of 20413436663666 is 66636663431402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9041966 + ... + 11071766.

It is an arithmetic number, because the mean of its divisors is an integer number (1940742407448).

Almost surely, 2^{20413436663666} is an apocalyptic number.

20413436663666 is a deficient number, since it is larger than the sum of its proper divisors (10638441855502).

20413436663666 is a wasteful number, since it uses less digits than its factorization.

20413436663666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100697.

The product of its (nonzero) digits is 40310784, while the sum is 56.

The spelling of 20413436663666 in words is "twenty trillion, four hundred thirteen billion, four hundred thirty-six million, six hundred sixty-three thousand, six hundred sixty-six".