20357930 has 32 divisors (see below), whose sum is σ = 38966400. Its totient is φ = 7636032.

The previous prime is 20357929. The next prime is 20357947. The reversal of 20357930 is 3975302.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20357893 and 20357902.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20219 + ... + 21201.

It is an arithmetic number, because the mean of its divisors is an integer number (1217700).

Almost surely, 2^20357930 is an apocalyptic number.

20357930 is a deficient number, since it is larger than the sum of its proper divisors (18608470).

20357930 is a wasteful number, since it uses less digits than its factorization.

20357930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 20357930 is about 4511.9762853987. The cubic root of 20357930 is about 273.0514825511.

The spelling of 20357930 in words is "twenty million, three hundred fifty-seven thousand, nine hundred thirty".