20726011 has 4 divisors (see below), whose sum is σ = 21394624. Its totient is φ = 20057400.

The previous prime is 20725993. The next prime is 20726029. The reversal of 20726011 is 11062702.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20725993) and next prime (20726029).

It is a cyclic number.

It is not a de Polignac number, because 20726011 - 2¹³ = 20717819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20726011.

It is not an unprimeable number, because it can be changed into a prime (20726081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334260 + ... + 334321.

It is an arithmetic number, because the mean of its divisors is an integer number (5348656).

Almost surely, 2^20726011 is an apocalyptic number.

20726011 is a deficient number, since it is larger than the sum of its proper divisors (668613).

20726011 is an equidigital number, since it uses as much as digits as its factorization.

20726011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668612.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 20726011 is about 4552.5828932596. The cubic root of 20726011 is about 274.6872963488.

Adding to 20726011 its reverse (11062702), we get a palindrome (31788713).

The spelling of 20726011 in words is "twenty million, seven hundred twenty-six thousand, eleven".