20470039 has 2 divisors, whose sum is σ = 20470040. Its totient is φ = 20470038.

The previous prime is 20470019. The next prime is 20470061. The reversal of 20470039 is 93007402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20470039 - 2¹¹ = 20467991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20469995 and 20470022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20470019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10235019 + 10235020.

It is an arithmetic number, because the mean of its divisors is an integer number (10235020).

Almost surely, 2^20470039 is an apocalyptic number.

20470039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20470039 is an equidigital number, since it uses as much as digits as its factorization.

20470039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20470039 is about 4524.3827203277. The cubic root of 20470039 is about 273.5517873207.

The spelling of 20470039 in words is "twenty million, four hundred seventy thousand, thirty-nine".