20666357351306 has 32 divisors (see below), whose sum is σ = 32085998992080. Its totient is φ = 9971415014400.

The previous prime is 20666357351273. The next prime is 20666357351333. The reversal of 20666357351306 is 60315375366602.

It can be written as a sum of positive squares in 8 ways, for example, as 13746779752225 + 6919577599081 = 3707665^2 + 2630509^2 .

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, 1402337570 + ... + 1402352306.

Almost surely, 2^{20666357351306} is an apocalyptic number.

20666357351306 is a deficient number, since it is larger than the sum of its proper divisors (11419641640774).

20666357351306 is a wasteful number, since it uses less digits than its factorization.

20666357351306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26330.

The product of its (nonzero) digits is 12247200, while the sum is 53.

The spelling of 20666357351306 in words is "twenty trillion, six hundred sixty-six billion, three hundred fifty-seven million, three hundred fifty-one thousand, three hundred six".