18201963 has 8 divisors (see below), whose sum is σ = 26136208. Its totient is φ = 11201184.

The previous prime is 18201961. The next prime is 18201977. The reversal of 18201963 is 36910281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18201963 - 2¹ = 18201961 is a prime.

It is a super-2 number, since 2×18201963² = 662622914106738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18201963.

It is not an unprimeable number, because it can be changed into a prime (18201961) 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, 233320 + ... + 233397.

It is an arithmetic number, because the mean of its divisors is an integer number (3267026).

Almost surely, 2^18201963 is an apocalyptic number.

18201963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18201963 is a deficient number, since it is larger than the sum of its proper divisors (7934245).

18201963 is a wasteful number, since it uses less digits than its factorization.

18201963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466733.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 18201963 is about 4266.3758624856. The cubic root of 18201963 is about 263.0506680464.

The spelling of 18201963 in words is "eighteen million, two hundred one thousand, nine hundred sixty-three".