20537029 has 2 divisors, whose sum is σ = 20537030. Its totient is φ = 20537028.

The previous prime is 20537021. The next prime is 20537039. The reversal of 20537029 is 92073502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 16129 = 4530^2 + 127^2 .

It is a cyclic number.

It is not a de Polignac number, because 20537029 - 2³ = 20537021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20536988 and 20537006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20537021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268514 + 10268515.

It is an arithmetic number, because the mean of its divisors is an integer number (10268515).

Almost surely, 2^20537029 is an apocalyptic number.

It is an amenable number.

20537029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20537029 is an equidigital number, since it uses as much as digits as its factorization.

20537029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20537029 is about 4531.7798931546. The cubic root of 20537029 is about 273.8498698042.

The spelling of 20537029 in words is "twenty million, five hundred thirty-seven thousand, twenty-nine".