20553234 has 16 divisors (see below), whose sum is σ = 44268672. Its totient is φ = 6324048.

The previous prime is 20553227. The next prime is 20553251. The reversal of 20553234 is 43235502.

It is a Curzon 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, 131674 + ... + 131829.

It is an arithmetic number, because the mean of its divisors is an integer number (2766792).

Almost surely, 2^20553234 is an apocalyptic number.

20553234 is an abundant number, since it is smaller than the sum of its proper divisors (23715438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20553234 is a wasteful number, since it uses less digits than its factorization.

20553234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263521.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 20553234 is about 4533.5674694439. The cubic root of 20553234 is about 273.9218790910.

Adding to 20553234 its reverse (43235502), we get a palindrome (63788736).

The spelling of 20553234 in words is "twenty million, five hundred fifty-three thousand, two hundred thirty-four".