20360531 has 2 divisors, whose sum is σ = 20360532. Its totient is φ = 20360530.

The previous prime is 20360507. The next prime is 20360537. The reversal of 20360531 is 13506302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20360531 - 2¹⁴ = 20344147 is a prime.

It is a super-2 number, since 2×20360531² = 829102445203922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20360537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180265 + 10180266.

It is an arithmetic number, because the mean of its divisors is an integer number (10180266).

Almost surely, 2^20360531 is an apocalyptic number.

20360531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20360531 is an equidigital number, since it uses as much as digits as its factorization.

20360531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20360531 is about 4512.2645090908. The cubic root of 20360531 is about 273.0631107251.

Adding to 20360531 its reverse (13506302), we get a palindrome (33866833).

The spelling of 20360531 in words is "twenty million, three hundred sixty thousand, five hundred thirty-one".