20150930 has 16 divisors (see below), whose sum is σ = 37442304. Its totient is φ = 7800240.

The previous prime is 20150891. The next prime is 20150953. The reversal of 20150930 is 3905102.

It is an unprimeable number.

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, 32192 + ... + 32811.

It is an arithmetic number, because the mean of its divisors is an integer number (2340144).

Almost surely, 2^20150930 is an apocalyptic number.

20150930 is a deficient number, since it is larger than the sum of its proper divisors (17291374).

20150930 is a wasteful number, since it uses less digits than its factorization.

20150930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65041.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 20150930 is about 4488.9787257237. The cubic root of 20150930 is about 272.1228629630.

The spelling of 20150930 in words is "twenty million, one hundred fifty thousand, nine hundred thirty".