181420530 has 16 divisors (see below), whose sum is σ = 435409344. Its totient is φ = 48378800.

The previous prime is 181420511. The next prime is 181420553. The reversal of 181420530 is 35024181.

It is a self number, because there is not a number n which added to its sum of digits gives 181420530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023646 + ... + 3023705.

It is an arithmetic number, because the mean of its divisors is an integer number (27213084).

Almost surely, 2^181420530 is an apocalyptic number.

181420530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181420530 is an abundant number, since it is smaller than the sum of its proper divisors (253988814).

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

181420530 is a wasteful number, since it uses less digits than its factorization.

181420530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047361.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 181420530 is about 13469.2438540551. The cubic root of 181420530 is about 566.1030270234.

The spelling of 181420530 in words is "one hundred eighty-one million, four hundred twenty thousand, five hundred thirty".