20883539 has 2 divisors, whose sum is σ = 20883540. Its totient is φ = 20883538.

The previous prime is 20883523. The next prime is 20883617. The reversal of 20883539 is 93538802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20883539 - 2⁴ = 20883523 is a prime.

It is a super-2 number, since 2×20883539² = 872244402329042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20886539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10441769 + 10441770.

It is an arithmetic number, because the mean of its divisors is an integer number (10441770).

Almost surely, 2^20883539 is an apocalyptic number.

20883539 is a deficient number, since it is larger than the sum of its proper divisors (1).

20883539 is an equidigital number, since it uses as much as digits as its factorization.

20883539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 20883539 is about 4569.8510916659. The cubic root of 20883539 is about 275.3814607025.

The spelling of 20883539 in words is "twenty million, eight hundred eighty-three thousand, five hundred thirty-nine".