20061539 has 2 divisors, whose sum is σ = 20061540. Its totient is φ = 20061538.

The previous prime is 20061523. The next prime is 20061553. The reversal of 20061539 is 93516002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20061539 - 2⁴ = 20061523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20061439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10030769 + 10030770.

It is an arithmetic number, because the mean of its divisors is an integer number (10030770).

Almost surely, 2^20061539 is an apocalyptic number.

20061539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20061539 is an equidigital number, since it uses as much as digits as its factorization.

20061539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 20061539 is about 4479.0109399286. The cubic root of 20061539 is about 271.7198808441.

The spelling of 20061539 in words is "twenty million, sixty-one thousand, five hundred thirty-nine".