20726755 has 24 divisors (see below), whose sum is σ = 29877120. Its totient is φ = 13749120.

The previous prime is 20726753. The next prime is 20726773. The reversal of 20726755 is 55762702.

It is a happy number.

It is not a de Polignac number, because 20726755 - 2¹ = 20726753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20726755.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726753) 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 23 ways as a sum of consecutive naturals, for example, 6231 + ... + 8959.

It is an arithmetic number, because the mean of its divisors is an integer number (1244880).

Almost surely, 2^20726755 is an apocalyptic number.

20726755 is a deficient number, since it is larger than the sum of its proper divisors (9150365).

20726755 is a wasteful number, since it uses less digits than its factorization.

20726755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2772 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 20726755 is about 4552.6646043828. The cubic root of 20726755 is about 274.6905831189.

It can be divided in two parts, 207 and 26755, that added together give a palindrome (26962).

The spelling of 20726755 in words is "twenty million, seven hundred twenty-six thousand, seven hundred fifty-five".