18963490 has 72 divisors (see below), whose sum is σ = 43184340. Its totient is φ = 5975424.

The previous prime is 18963487. The next prime is 18963491. The reversal of 18963490 is 9436981.

It can be written as a sum of positive squares in 6 ways, for example, as 5764801 + 13198689 = 2401^2 + 3633^2 .

It is a super-2 number, since 2×18963490² = 719227905960200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18963491) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 82696 + ... + 82924.

Almost surely, 2^18963490 is an apocalyptic number.

18963490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18963490 is an abundant number, since it is smaller than the sum of its proper divisors (24220850).

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

18963490 is a wasteful number, since it uses less digits than its factorization.

18963490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18963490 is about 4354.7089454980. The cubic root of 18963490 is about 266.6691371299.

The spelling of 18963490 in words is "eighteen million, nine hundred sixty-three thousand, four hundred ninety".