20444087 has 2 divisors, whose sum is σ = 20444088. Its totient is φ = 20444086.

The previous prime is 20444077. The next prime is 20444111. The reversal of 20444087 is 78044402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20444087 - 2⁶ = 20444023 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222043 + 10222044.

It is an arithmetic number, because the mean of its divisors is an integer number (10222044).

Almost surely, 2^20444087 is an apocalyptic number.

20444087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444087 is an equidigital number, since it uses as much as digits as its factorization.

20444087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 20444087 is about 4521.5137951797. The cubic root of 20444087 is about 273.4361350702.

Adding to 20444087 its reverse (78044402), we get a palindrome (98488489).

It can be divided in two parts, 2044 and 4087, that multiplied together give a triangular number (8353828 = T₄₀₈₇).

The spelling of 20444087 in words is "twenty million, four hundred forty-four thousand, eighty-seven".