13020278 has 4 divisors (see below), whose sum is σ = 19530420. Its totient is φ = 6510138.

The previous prime is 13020251. The next prime is 13020307. The reversal of 13020278 is 87202031.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255068 + ... + 3255071.

It is an arithmetic number, because the mean of its divisors is an integer number (4882605).

Almost surely, 2^13020278 is an apocalyptic number.

13020278 is a deficient number, since it is larger than the sum of its proper divisors (6510142).

13020278 is an equidigital number, since it uses as much as digits as its factorization.

13020278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6510141.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 13020278 is about 3608.3622323708. The cubic root of 13020278 is about 235.2556626052.

The spelling of 13020278 in words is "thirteen million, twenty thousand, two hundred seventy-eight".