190018530 has 144 divisors (see below), whose sum is σ = 553021560. Its totient is φ = 45264960.

The previous prime is 190018519. The next prime is 190018541. The reversal of 190018530 is 35810091.

It is an interprime number because it is at equal distance from previous prime (190018519) and next prime (190018541).

It can be written as a sum of positive squares in 4 ways, for example, as 3122289 + 186896241 = 1767^2 + 13671^2 .

It is a super-2 number, since 2×190018530² = 72214083486721800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190018494 and 190018503.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6129615 + ... + 6129645.

Almost surely, 2^190018530 is an apocalyptic number.

190018530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 190018530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276510780).

190018530 is an abundant number, since it is smaller than the sum of its proper divisors (363003030).

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

190018530 is a wasteful number, since it uses less digits than its factorization.

190018530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 190018530 is about 13784.7208894486. The cubic root of 190018530 is about 574.9083962454.

The spelling of 190018530 in words is "one hundred ninety million, eighteen thousand, five hundred thirty".