20525930 has 16 divisors (see below), whose sum is σ = 37156320. Its totient is φ = 8163792.

The previous prime is 20525929. The next prime is 20525941. The reversal of 20525930 is 3952502.

It is a self number, because there is not a number n which added to its sum of digits gives 20525930.

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, 3944 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (2322270).

Almost surely, 2^20525930 is an apocalyptic number.

20525930 is a deficient number, since it is larger than the sum of its proper divisors (16630390).

20525930 is a wasteful number, since it uses less digits than its factorization.

20525930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11653.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 20525930 is about 4530.5551536208. Note that the first 3 decimals coincide. The cubic root of 20525930 is about 273.8005279152.

The spelling of 20525930 in words is "twenty million, five hundred twenty-five thousand, nine hundred thirty".