18063428 has 6 divisors (see below), whose sum is σ = 31611006. Its totient is φ = 9031712.

The previous prime is 18063413. The next prime is 18063439. The reversal of 18063428 is 82436081.

It can be written as a sum of positive squares in only one way, i.e., 17825284 + 238144 = 4222^2 + 488^2 .

It is a super-2 number, since 2×18063428² = 652574862222368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18063394 and 18063403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2257925 + ... + 2257932.

It is an arithmetic number, because the mean of its divisors is an integer number (5268501).

Almost surely, 2^18063428 is an apocalyptic number.

It is an amenable number.

18063428 is a deficient number, since it is larger than the sum of its proper divisors (13547578).

18063428 is a wasteful number, since it uses less digits than its factorization.

18063428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515861 (or 4515859 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18063428 is about 4250.1091750683. The cubic root of 18063428 is about 262.3816088947.

The spelling of 18063428 in words is "eighteen million, sixty-three thousand, four hundred twenty-eight".