20623430 has 32 divisors (see below), whose sum is σ = 38495520. Its totient is φ = 7948800.

The previous prime is 20623411. The next prime is 20623439. The reversal of 20623430 is 3432602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20623439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51230 + ... + 51630.

It is an arithmetic number, because the mean of its divisors is an integer number (1202985).

Almost surely, 2^20623430 is an apocalyptic number.

20623430 is a deficient number, since it is larger than the sum of its proper divisors (17872090).

20623430 is a wasteful number, since it uses less digits than its factorization.

20623430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20623430 is about 4541.3026765456. The cubic root of 20623430 is about 274.2333689430.

The spelling of 20623430 in words is "twenty million, six hundred twenty-three thousand, four hundred thirty".