20072729 has 2 divisors, whose sum is σ = 20072730. Its totient is φ = 20072728.

The previous prime is 20072711. The next prime is 20072747. The reversal of 20072729 is 92727002.

It is a balanced prime because it is at equal distance from previous prime (20072711) and next prime (20072747).

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 1106704 = 4355^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 20072729 - 2²⁰ = 19024153 is a prime.

It is not a weakly prime, because it can be changed into another prime (20072749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036364 + 10036365.

It is an arithmetic number, because the mean of its divisors is an integer number (10036365).

Almost surely, 2^20072729 is an apocalyptic number.

It is an amenable number.

20072729 is a deficient number, since it is larger than the sum of its proper divisors (1).

20072729 is an equidigital number, since it uses as much as digits as its factorization.

20072729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20072729 is about 4480.2599254954. The cubic root of 20072729 is about 271.7703917632.

The spelling of 20072729 in words is "twenty million, seventy-two thousand, seven hundred twenty-nine".