20531059 has 2 divisors, whose sum is σ = 20531060. Its totient is φ = 20531058.

The previous prime is 20531023. The next prime is 20531089. The reversal of 20531059 is 95013502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20531059 - 2⁷ = 20530931 is a prime.

It is a super-2 number, since 2×20531059² = 843048767322962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20531089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265529 + 10265530.

It is an arithmetic number, because the mean of its divisors is an integer number (10265530).

Almost surely, 2^20531059 is an apocalyptic number.

20531059 is a deficient number, since it is larger than the sum of its proper divisors (1).

20531059 is an equidigital number, since it uses as much as digits as its factorization.

20531059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20531059 is about 4531.1211636857. The cubic root of 20531059 is about 273.8233316883.

The spelling of 20531059 in words is "twenty million, five hundred thirty-one thousand, fifty-nine".