20726753 has 2 divisors, whose sum is σ = 20726754. Its totient is φ = 20726752.

The previous prime is 20726743. The next prime is 20726773. The reversal of 20726753 is 35762702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12334144 + 8392609 = 3512^2 + 2897^2 .

It is a cyclic number.

It is not a de Polignac number, because 20726753 - 2⁴ = 20726737 is a prime.

It is a super-3 number, since 3×20726753³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20726743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10363376 + 10363377.

It is an arithmetic number, because the mean of its divisors is an integer number (10363377).

Almost surely, 2^20726753 is an apocalyptic number.

It is an amenable number.

20726753 is a deficient number, since it is larger than the sum of its proper divisors (1).

20726753 is an equidigital number, since it uses as much as digits as its factorization.

20726753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 20726753 is about 4552.6643847312. The cubic root of 20726753 is about 274.6905742836.

The spelling of 20726753 in words is "twenty million, seven hundred twenty-six thousand, seven hundred fifty-three".