18963730 has 32 divisors (see below), whose sum is σ = 36505728. Its totient is φ = 7075200.

The previous prime is 18963727. The next prime is 18963739. The reversal of 18963730 is 3736981.

It is a self number, because there is not a number n which added to its sum of digits gives 18963730.

It is not an unprimeable number, because it can be changed into a prime (18963739) 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, 8425 + ... + 10435.

It is an arithmetic number, because the mean of its divisors is an integer number (1140804).

Almost surely, 2^18963730 is an apocalyptic number.

18963730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18963730 is a deficient number, since it is larger than the sum of its proper divisors (17541998).

18963730 is a wasteful number, since it uses less digits than its factorization.

18963730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 18963730 is about 4354.7365017875. The cubic root of 18963730 is about 266.6702621043.

The spelling of 18963730 in words is "eighteen million, nine hundred sixty-three thousand, seven hundred thirty".