20051697 has 8 divisors (see below), whose sum is σ = 26758080. Its totient is φ = 13356560.

The previous prime is 20051683. The next prime is 20051711. The reversal of 20051697 is 79615002.

It is an interprime number because it is at equal distance from previous prime (20051683) and next prime (20051711).

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

It is a cyclic number.

It is not a de Polignac number, because 20051697 - 2¹¹ = 20049649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20051617) 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, 3172 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (3344760).

Almost surely, 2^20051697 is an apocalyptic number.

It is an amenable number.

20051697 is a deficient number, since it is larger than the sum of its proper divisors (6706383).

20051697 is a wasteful number, since it uses less digits than its factorization.

20051697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20051697 is about 4477.9121250869. The cubic root of 20051697 is about 271.6754391804.

Adding to 20051697 its reverse (79615002), we get a palindrome (99666699).

The spelling of 20051697 in words is "twenty million, fifty-one thousand, six hundred ninety-seven".