18970538 has 24 divisors (see below), whose sum is σ = 31564512. Its totient is φ = 8533184.

The previous prime is 18970519. The next prime is 18970541. The reversal of 18970538 is 83507981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18970495 and 18970504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12581 + ... + 14007.

It is an arithmetic number, because the mean of its divisors is an integer number (1315188).

Almost surely, 2^18970538 is an apocalyptic number.

18970538 is a deficient number, since it is larger than the sum of its proper divisors (12593974).

18970538 is a wasteful number, since it uses less digits than its factorization.

18970538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 18970538 is about 4355.5181092495. The cubic root of 18970538 is about 266.7021699258.

The spelling of 18970538 in words is "eighteen million, nine hundred seventy thousand, five hundred thirty-eight".