20726115 has 32 divisors (see below), whose sum is σ = 34546176. Its totient is φ = 10602240.

The previous prime is 20726113. The next prime is 20726117. The reversal of 20726115 is 51162702.

It is an interprime number because it is at equal distance from previous prime (20726113) and next prime (20726117).

It is not a de Polignac number, because 20726115 - 2¹ = 20726113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20726113) 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 31 ways as a sum of consecutive naturals, for example, 40954 + ... + 41456.

It is an arithmetic number, because the mean of its divisors is an integer number (1079568).

Almost surely, 2^20726115 is an apocalyptic number.

20726115 is a deficient number, since it is larger than the sum of its proper divisors (13820061).

20726115 is a wasteful number, since it uses less digits than its factorization.

20726115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619.

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

The square root of 20726115 is about 4552.5943153327. The cubic root of 20726115 is about 274.6877557945.

Adding to 20726115 its reverse (51162702), we get a palindrome (71888817).

The spelling of 20726115 in words is "twenty million, seven hundred twenty-six thousand, one hundred fifteen".