20385534 has 16 divisors (see below), whose sum is σ = 43907472. Its totient is φ = 6272448.

The previous prime is 20385517. The next prime is 20385559. The reversal of 20385534 is 43558302.

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, 130599 + ... + 130754.

It is an arithmetic number, because the mean of its divisors is an integer number (2744217).

Almost surely, 2^20385534 is an apocalyptic number.

20385534 is an abundant number, since it is smaller than the sum of its proper divisors (23521938).

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

20385534 is a wasteful number, since it uses less digits than its factorization.

20385534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261371.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 20385534 is about 4515.0342191394. The cubic root of 20385534 is about 273.1748400337.

The spelling of 20385534 in words is "twenty million, three hundred eighty-five thousand, five hundred thirty-four".