20542134 has 16 divisors (see below), whose sum is σ = 41158080. Its totient is φ = 6835080.

The previous prime is 20542099. The next prime is 20542153. The reversal of 20542134 is 43124502.

It is a self number, because there is not a number n which added to its sum of digits gives 20542134.

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, 949 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (2572380).

Almost surely, 2^20542134 is an apocalyptic number.

20542134 is an abundant number, since it is smaller than the sum of its proper divisors (20615946).

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

20542134 is a wasteful number, since it uses less digits than its factorization.

20542134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20542134 is about 4532.3431026347. The cubic root of 20542134 is about 273.8725587038.

Adding to 20542134 its reverse (43124502), we get a palindrome (63666636).

The spelling of 20542134 in words is "twenty million, five hundred forty-two thousand, one hundred thirty-four".