20315601 has 12 divisors (see below), whose sum is σ = 30620928. Its totient is φ = 12954744.

The previous prime is 20315569. The next prime is 20315657. The reversal of 20315601 is 10651302.

It is not a de Polignac number, because 20315601 - 2⁵ = 20315569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20315671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48865 + ... + 49278.

It is an arithmetic number, because the mean of its divisors is an integer number (2551744).

Almost surely, 2^20315601 is an apocalyptic number.

It is an amenable number.

20315601 is a deficient number, since it is larger than the sum of its proper divisors (10305327).

20315601 is a wasteful number, since it uses less digits than its factorization.

20315601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98172 (or 98169 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 20315601 is about 4507.2831062626. The cubic root of 20315601 is about 272.8621048150.

Adding to 20315601 its reverse (10651302), we get a palindrome (30966903).

The spelling of 20315601 in words is "twenty million, three hundred fifteen thousand, six hundred one".