20151065 has 8 divisors (see below), whose sum is σ = 26379648. Its totient is φ = 14655280.

The previous prime is 20151041. The next prime is 20151067. The reversal of 20151065 is 56015102.

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

It is not a de Polignac number, because 20151065 - 2¹² = 20146969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151067) 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, 183137 + ... + 183246.

It is an arithmetic number, because the mean of its divisors is an integer number (3297456).

Almost surely, 2^20151065 is an apocalyptic number.

It is an amenable number.

20151065 is a deficient number, since it is larger than the sum of its proper divisors (6228583).

20151065 is a wasteful number, since it uses less digits than its factorization.

20151065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366399.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 20151065 is about 4488.9937625263. The cubic root of 20151065 is about 272.1234706522.

Adding to 20151065 its reverse (56015102), we get a palindrome (76166167).

The spelling of 20151065 in words is "twenty million, one hundred fifty-one thousand, sixty-five".