20415465352666 has 16 divisors (see below), whose sum is σ = 30706793779968. Its totient is φ = 10179904957200.

The previous prime is 20415465352643. The next prime is 20415465352673. The reversal of 20415465352666 is 66625356451402.

It is an unprimeable number.

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, 8294050 + ... + 10470061.

It is an arithmetic number, because the mean of its divisors is an integer number (1919174611248).

Almost surely, 2^{20415465352666} is an apocalyptic number.

20415465352666 is a deficient number, since it is larger than the sum of its proper divisors (10291328427302).

20415465352666 is a wasteful number, since it uses less digits than its factorization.

20415465352666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765597.

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 20415465352666 in words is "twenty trillion, four hundred fifteen billion, four hundred sixty-five million, three hundred fifty-two thousand, six hundred sixty-six".