13603820 has 24 divisors (see below), whose sum is σ = 28746144. Its totient is φ = 5407616.

The previous prime is 13603819. The next prime is 13603847. The reversal of 13603820 is 2830631.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304 + ... + 5376.

It is an arithmetic number, because the mean of its divisors is an integer number (1197756).

Almost surely, 2^13603820 is an apocalyptic number.

13603820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13603820 is an abundant number, since it is smaller than the sum of its proper divisors (15142324).

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

13603820 is a wasteful number, since it uses less digits than its factorization.

13603820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13603820 is about 3688.3356680216. The cubic root of 13603820 is about 238.7189848512.

The spelling of 13603820 in words is "thirteen million, six hundred three thousand, eight hundred twenty".