20660151 has 32 divisors (see below), whose sum is σ = 30801600. Its totient is φ = 12257280.

The previous prime is 20660137. The next prime is 20660153. The reversal of 20660151 is 15106602.

20660151 = 179² + 180² + ... + 407².

It is a happy number.

It is not a de Polignac number, because 20660151 - 2¹⁰ = 20659127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90105 + ... + 90333.

It is an arithmetic number, because the mean of its divisors is an integer number (962550).

Almost surely, 2^20660151 is an apocalyptic number.

20660151 is a deficient number, since it is larger than the sum of its proper divisors (10141449).

20660151 is a wasteful number, since it uses less digits than its factorization.

20660151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 20660151 is about 4545.3438813802. The cubic root of 20660151 is about 274.3960342977.

Adding to 20660151 its reverse (15106602), we get a palindrome (35766753).

The spelling of 20660151 in words is "twenty million, six hundred sixty thousand, one hundred fifty-one".