13020858 has 16 divisors (see below), whose sum is σ = 28935360. Its totient is φ = 4340268.

The previous prime is 13020857. The next prime is 13020883. The reversal of 13020858 is 85802031.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13020853) 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, 120510 + ... + 120617.

It is an arithmetic number, because the mean of its divisors is an integer number (1808460).

Almost surely, 2^13020858 is an apocalyptic number.

13020858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13020858 is an abundant number, since it is smaller than the sum of its proper divisors (15914502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13020858 is a wasteful number, since it uses less digits than its factorization.

13020858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241138 (or 241132 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 13020858 is about 3608.4426003471. The cubic root of 13020858 is about 235.2591557784.

Adding to 13020858 its reverse (85802031), we get a palindrome (98822889).

The spelling of 13020858 in words is "thirteen million, twenty thousand, eight hundred fifty-eight".