20851200352603 has 4 divisors (see below), whose sum is σ = 21523819718848. Its totient is φ = 20178580986360.

The previous prime is 20851200352483. The next prime is 20851200352613. The reversal of 20851200352603 is 30625300215802.

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

It is a cyclic number.

It is not a de Polignac number, because 20851200352603 - 2³⁷ = 20713761399131 is a prime.

It is a super-2 number, since 2×20851200352603² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20851200352613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336309683076 + ... + 336309683137.

It is an arithmetic number, because the mean of its divisors is an integer number (5380954929712).

Almost surely, 2^{20851200352603} is an apocalyptic number.

20851200352603 is a deficient number, since it is larger than the sum of its proper divisors (672619366245).

20851200352603 is an equidigital number, since it uses as much as digits as its factorization.

20851200352603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672619366244.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20851200352603 in words is "twenty trillion, eight hundred fifty-one billion, two hundred million, three hundred fifty-two thousand, six hundred three".