18803397 has 16 divisors (see below), whose sum is σ = 27066240. Its totient is φ = 11575872.

The previous prime is 18803383. The next prime is 18803399. The reversal of 18803397 is 79330881.

It is not a de Polignac number, because 18803397 - 2⁴ = 18803381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18803399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2698 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (1691640).

Almost surely, 2^18803397 is an apocalyptic number.

It is an amenable number.

18803397 is a deficient number, since it is larger than the sum of its proper divisors (8262843).

18803397 is a wasteful number, since it uses less digits than its factorization.

18803397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18803397 is about 4336.2883898560. The cubic root of 18803397 is about 265.9165934063.

The spelling of 18803397 in words is "eighteen million, eight hundred three thousand, three hundred ninety-seven".