20401365185 has 8 divisors (see below), whose sum is σ = 25921734696. Its totient is φ = 15361027840.

The previous prime is 20401365119. The next prime is 20401365203. The reversal of 20401365185 is 58156310402.

It can be written as a sum of positive squares in 4 ways, for example, as 2232751504 + 18168613681 = 47252^2 + 134791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20401365185 - 2²⁰ = 20400316609 is a prime.

It is a Duffinian number.

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, 120007946 + ... + 120008115.

It is an arithmetic number, because the mean of its divisors is an integer number (3240216837).

Almost surely, 2^20401365185 is an apocalyptic number.

It is an amenable number.

20401365185 is a deficient number, since it is larger than the sum of its proper divisors (5520369511).

20401365185 is a wasteful number, since it uses less digits than its factorization.

20401365185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240016083.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 20401365185 its reverse (58156310402), we get a palindrome (78557675587).

The spelling of 20401365185 in words is "twenty billion, four hundred one million, three hundred sixty-five thousand, one hundred eighty-five".