20726151 has 16 divisors (see below), whose sum is σ = 29057280. Its totient is φ = 13115520.

The previous prime is 20726149. The next prime is 20726171. The reversal of 20726151 is 15162702.

It is not a de Polignac number, because 20726151 - 2¹ = 20726149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8511 + ... + 10671.

It is an arithmetic number, because the mean of its divisors is an integer number (1816080).

Almost surely, 2^20726151 is an apocalyptic number.

20726151 is a deficient number, since it is larger than the sum of its proper divisors (8331129).

20726151 is a wasteful number, since it uses less digits than its factorization.

20726151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 20726151 is about 4552.5982691206. The cubic root of 20726151 is about 274.6879148330.

Adding to 20726151 its reverse (15162702), we get a palindrome (35888853).

The spelling of 20726151 in words is "twenty million, seven hundred twenty-six thousand, one hundred fifty-one".