20355312013466 has 4 divisors (see below), whose sum is σ = 30532968020202. Its totient is φ = 10177656006732.

The previous prime is 20355312013429. The next prime is 20355312013481. The reversal of 20355312013466 is 66431021355302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19398113940241 + 957198073225 = 4404329^2 + 978365^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5088828003365 + ... + 5088828003368.

Almost surely, 2^{20355312013466} is an apocalyptic number.

20355312013466 is a deficient number, since it is larger than the sum of its proper divisors (10177656006736).

20355312013466 is a wasteful number, since it uses less digits than its factorization.

20355312013466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10177656006735.

The product of its (nonzero) digits is 388800, while the sum is 41.

Adding to 20355312013466 its reverse (66431021355302), we get a palindrome (86786333368768).

The spelling of 20355312013466 in words is "twenty trillion, three hundred fifty-five billion, three hundred twelve million, thirteen thousand, four hundred sixty-six".