20580631 has 2 divisors, whose sum is σ = 20580632. Its totient is φ = 20580630.

The previous prime is 20580619. The next prime is 20580649. The reversal of 20580631 is 13608502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20580631 - 2⁷ = 20580503 is a prime.

It is a super-2 number, since 2×20580631² = 847124744716322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20580596 and 20580605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20584631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10290315 + 10290316.

It is an arithmetic number, because the mean of its divisors is an integer number (10290316).

Almost surely, 2^20580631 is an apocalyptic number.

20580631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20580631 is an equidigital number, since it uses as much as digits as its factorization.

20580631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20580631 is about 4536.5880350766. The cubic root of 20580631 is about 274.0435356259.

The spelling of 20580631 in words is "twenty million, five hundred eighty thousand, six hundred thirty-one".