18970831 has 8 divisors (see below), whose sum is σ = 20780928. Its totient is φ = 17175000.

The previous prime is 18970811. The next prime is 18970841. The reversal of 18970831 is 13807981.

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

It is a cyclic number.

It is not a de Polignac number, because 18970831 - 2⁹ = 18970319 is a prime.

It is a super-2 number, since 2×18970831² = 719784857661122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18970811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 675 + ... + 6196.

It is an arithmetic number, because the mean of its divisors is an integer number (2597616).

Almost surely, 2^18970831 is an apocalyptic number.

18970831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18970831 is a deficient number, since it is larger than the sum of its proper divisors (1810097).

18970831 is a wasteful number, since it uses less digits than its factorization.

18970831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 18970831 is about 4355.5517446128. The cubic root of 18970831 is about 266.7035429906.

The spelling of 18970831 in words is "eighteen million, nine hundred seventy thousand, eight hundred thirty-one".