20533430 has 16 divisors (see below), whose sum is σ = 37013760. Its totient is φ = 8201472.

The previous prime is 20533427. The next prime is 20533451. The reversal of 20533430 is 3433502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9926 + ... + 11814.

It is an arithmetic number, because the mean of its divisors is an integer number (2313360).

Almost surely, 2^20533430 is an apocalyptic number.

20533430 is a deficient number, since it is larger than the sum of its proper divisors (16480330).

20533430 is a wasteful number, since it uses less digits than its factorization.

20533430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983.

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 20533430 is about 4531.3827911577. The cubic root of 20533430 is about 273.8338719813.

Adding to 20533430 its reverse (3433502), we get a palindrome (23966932).

The spelling of 20533430 in words is "twenty million, five hundred thirty-three thousand, four hundred thirty".