13020447 has 12 divisors (see below), whose sum is σ = 19082840. Its totient is φ = 7890960.

The previous prime is 13020439. The next prime is 13020467. The reversal of 13020447 is 74402031.

It is not a de Polignac number, because 13020447 - 2³ = 13020439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17572 + ... + 18297.

Almost surely, 2^13020447 is an apocalyptic number.

13020447 is a deficient number, since it is larger than the sum of its proper divisors (6062393).

13020447 is a wasteful number, since it uses less digits than its factorization.

13020447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35894 (or 35883 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 13020447 is about 3608.3856501211. The cubic root of 13020447 is about 235.2566804543.

Adding to 13020447 its reverse (74402031), we get a palindrome (87422478).

The spelling of 13020447 in words is "thirteen million, twenty thousand, four hundred forty-seven".