20485039 has 2 divisors, whose sum is σ = 20485040. Its totient is φ = 20485038.

The previous prime is 20485033. The next prime is 20485067. The reversal of 20485039 is 93058402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20485039 - 2⁵ = 20485007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20485039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20485033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10242519 + 10242520.

It is an arithmetic number, because the mean of its divisors is an integer number (10242520).

Almost surely, 2^20485039 is an apocalyptic number.

20485039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20485039 is an equidigital number, since it uses as much as digits as its factorization.

20485039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20485039 is about 4526.0401014573. The cubic root of 20485039 is about 273.6185886094.

The spelling of 20485039 in words is "twenty million, four hundred eighty-five thousand, thirty-nine".