20726253 has 16 divisors (see below), whose sum is σ = 31536960. Its totient is φ = 13443408.

The previous prime is 20726239. The next prime is 20726257. The reversal of 20726253 is 35262702.

It is not a de Polignac number, because 20726253 - 2⁹ = 20725741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726257) 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 15 ways as a sum of consecutive naturals, for example, 9375 + ... + 11372.

It is an arithmetic number, because the mean of its divisors is an integer number (1971060).

Almost surely, 2^20726253 is an apocalyptic number.

It is an amenable number.

20726253 is a deficient number, since it is larger than the sum of its proper divisors (10810707).

20726253 is a wasteful number, since it uses less digits than its factorization.

20726253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20793 (or 20787 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20726253 is about 4552.6094715009. The cubic root of 20726253 is about 274.6883654413.

Adding to 20726253 its reverse (35262702), we get a palindrome (55988955).

The spelling of 20726253 in words is "twenty million, seven hundred twenty-six thousand, two hundred fifty-three".