20246491 has 2 divisors, whose sum is σ = 20246492. Its totient is φ = 20246490.

The previous prime is 20246483. The next prime is 20246539. The reversal of 20246491 is 19464202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20246491 - 2³ = 20246483 is a prime.

It is not a weakly prime, because it can be changed into another prime (20246591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123245 + 10123246.

It is an arithmetic number, because the mean of its divisors is an integer number (10123246).

Almost surely, 2^20246491 is an apocalyptic number.

20246491 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246491 is an equidigital number, since it uses as much as digits as its factorization.

20246491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20246491 is about 4499.6100942193. The cubic root of 20246491 is about 272.5523441236.

It can be divided in two parts, 2024 and 6491, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 20246491 in words is "twenty million, two hundred forty-six thousand, four hundred ninety-one".