20925430 has 8 divisors (see below), whose sum is σ = 37665792. Its totient is φ = 8370168.

The previous prime is 20925389. The next prime is 20925433. The reversal of 20925430 is 3452902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20925395 and 20925404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20925433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046262 + ... + 1046281.

It is an arithmetic number, because the mean of its divisors is an integer number (4708224).

Almost surely, 2^20925430 is an apocalyptic number.

20925430 is a deficient number, since it is larger than the sum of its proper divisors (16740362).

20925430 is a wasteful number, since it uses less digits than its factorization.

20925430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092550.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20925430 is about 4574.4322052032. The cubic root of 20925430 is about 275.5654700613.

The spelling of 20925430 in words is "twenty million, nine hundred twenty-five thousand, four hundred thirty".