18877963 has 16 divisors (see below), whose sum is σ = 22337280. Its totient is φ = 15786144.

The previous prime is 18877951. The next prime is 18877981. The reversal of 18877963 is 36977881.

It is a cyclic number.

It is not a de Polignac number, because 18877963 - 2¹⁷ = 18746891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18877993) 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, 4020 + ... + 7342.

It is an arithmetic number, because the mean of its divisors is an integer number (1396080).

Almost surely, 2^18877963 is an apocalyptic number.

18877963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18877963 is a deficient number, since it is larger than the sum of its proper divisors (3459317).

18877963 is a wasteful number, since it uses less digits than its factorization.

18877963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3378.

The product of its digits is 508032, while the sum is 49.

The square root of 18877963 is about 4344.8777888452. The cubic root of 18877963 is about 266.2676325322.

The spelling of 18877963 in words is "eighteen million, eight hundred seventy-seven thousand, nine hundred sixty-three".