18970930 has 64 divisors (see below), whose sum is σ = 40694400. Its totient is φ = 6289920.

The previous prime is 18970927. The next prime is 18970933. The reversal of 18970930 is 3907981.

It is an interprime number because it is at equal distance from previous prime (18970927) and next prime (18970933).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 18970930.

It is not an unprimeable number, because it can be changed into a prime (18970933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60454 + ... + 60766.

It is an arithmetic number, because the mean of its divisors is an integer number (635850).

Almost surely, 2^18970930 is an apocalyptic number.

18970930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18970930 is the 2755-th heptagonal number.

18970930 is an abundant number, since it is smaller than the sum of its proper divisors (21723470).

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

18970930 is a wasteful number, since it uses less digits than its factorization.

18970930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 18970930 is about 4355.5631094039. The cubic root of 18970930 is about 266.7040069239.

It can be divided in two parts, 18970 and 930, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 18970930 in words is "eighteen million, nine hundred seventy thousand, nine hundred thirty".