20455039 has 8 divisors (see below), whose sum is σ = 23489280. Its totient is φ = 17616600.

The previous prime is 20455013. The next prime is 20455051. The reversal of 20455039 is 93055402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20455039 - 2⁵ = 20455007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20454998 and 20455016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48727 + ... + 49144.

It is an arithmetic number, because the mean of its divisors is an integer number (2936160).

Almost surely, 2^20455039 is an apocalyptic number.

20455039 is a deficient number, since it is larger than the sum of its proper divisors (3034241).

20455039 is a wasteful number, since it uses less digits than its factorization.

20455039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97901.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20455039 is about 4522.7247318403. The cubic root of 20455039 is about 273.4849533904.

The spelling of 20455039 in words is "twenty million, four hundred fifty-five thousand, thirty-nine".