20013697 has 8 divisors (see below), whose sum is σ = 22079520. Its totient is φ = 17988960.

The previous prime is 20013689. The next prime is 20013731. The reversal of 20013697 is 79631002.

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

It is not a de Polignac number, because 20013697 - 2³ = 20013689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9243 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (2759940).

Almost surely, 2^20013697 is an apocalyptic number.

It is an amenable number.

20013697 is a deficient number, since it is larger than the sum of its proper divisors (2065823).

20013697 is a wasteful number, since it uses less digits than its factorization.

20013697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20543.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20013697 is about 4473.6670640538. The cubic root of 20013697 is about 271.5037131493.

Adding to 20013697 its reverse (79631002), we get a palindrome (99644699).

The spelling of 20013697 in words is "twenty million, thirteen thousand, six hundred ninety-seven".