20726953 has 8 divisors (see below), whose sum is σ = 22796928. Its totient is φ = 18724944.

The previous prime is 20726939. The next prime is 20726971. The reversal of 20726953 is 35962702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20726953 - 2⁵ = 20726921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20726653) 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 7 ways as a sum of consecutive naturals, for example, 16351 + ... + 17572.

It is an arithmetic number, because the mean of its divisors is an integer number (2849616).

Almost surely, 2^20726953 is an apocalyptic number.

It is an amenable number.

20726953 is a deficient number, since it is larger than the sum of its proper divisors (2069975).

20726953 is a wasteful number, since it uses less digits than its factorization.

20726953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33983.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 20726953 is about 4552.6863498379. The cubic root of 20726953 is about 274.6914578106.

It can be divided in two parts, 2072 and 6953, that added together give a square (9025 = 95²).

The spelling of 20726953 in words is "twenty million, seven hundred twenty-six thousand, nine hundred fifty-three".