18970539 has 8 divisors (see below), whose sum is σ = 28907520. Its totient is φ = 10840296.

The previous prime is 18970519. The next prime is 18970541. The reversal of 18970539 is 93507981.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18970539 - 2⁷ = 18970411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18970539.

It is not an unprimeable number, because it can be changed into a prime (18970519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451659 + ... + 451700.

It is an arithmetic number, because the mean of its divisors is an integer number (3613440).

Almost surely, 2^18970539 is an apocalyptic number.

18970539 is a deficient number, since it is larger than the sum of its proper divisors (9936981).

18970539 is an equidigital number, since it uses as much as digits as its factorization.

18970539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903369.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 18970539 is about 4355.5182240464. The cubic root of 18970539 is about 266.7021746120.

The spelling of 18970539 in words is "eighteen million, nine hundred seventy thousand, five hundred thirty-nine".