20112534 has 96 divisors (see below), whose sum is σ = 50791104. Its totient is φ = 5702400.

The previous prime is 20112523. The next prime is 20112541. The reversal of 20112534 is 43521102.

20112534 is a `hidden beast` number, since 20 + 112 + 534 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199084 + ... + 199184.

It is an arithmetic number, because the mean of its divisors is an integer number (529074).

Almost surely, 2^20112534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25395552).

20112534 is an abundant number, since it is smaller than the sum of its proper divisors (30678570).

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

20112534 is a wasteful number, since it uses less digits than its factorization.

20112534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20112534 is about 4484.6999899659. The cubic root of 20112534 is about 271.9499168890.

Adding to 20112534 its reverse (43521102), we get a palindrome (63633636).

The spelling of 20112534 in words is "twenty million, one hundred twelve thousand, five hundred thirty-four".