20370439 has 2 divisors, whose sum is σ = 20370440. Its totient is φ = 20370438.

The previous prime is 20370377. The next prime is 20370443. The reversal of 20370439 is 93407302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20370439 - 2²³ = 11981831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20370739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10185219 + 10185220.

It is an arithmetic number, because the mean of its divisors is an integer number (10185220).

Almost surely, 2^20370439 is an apocalyptic number.

20370439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20370439 is an equidigital number, since it uses as much as digits as its factorization.

20370439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20370439 is about 4513.3622721869. The cubic root of 20370439 is about 273.1073969074.

The spelling of 20370439 in words is "twenty million, three hundred seventy thousand, four hundred thirty-nine".