20354436466555 has 8 divisors (see below), whose sum is σ = 24425349981552. Its totient is φ = 16283531692128.

The previous prime is 20354436466547. The next prime is 20354436466579. The reversal of 20354436466555 is 55566463445302.

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 20354436466555 - 2³ = 20354436466547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20354436466555.

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, 5218537 + ... + 8242693.

It is an arithmetic number, because the mean of its divisors is an integer number (3053168747694).

Almost surely, 2^{20354436466555} is an apocalyptic number.

20354436466555 is a deficient number, since it is larger than the sum of its proper divisors (4070913514997).

20354436466555 is a wasteful number, since it uses less digits than its factorization.

20354436466555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370285.

The product of its (nonzero) digits is 155520000, while the sum is 58.

The spelling of 20354436466555 in words is "twenty trillion, three hundred fifty-four billion, four hundred thirty-six million, four hundred sixty-six thousand, five hundred fifty-five".