20531134 has 48 divisors (see below), whose sum is σ = 36892800. Its totient is φ = 8525088.

The previous prime is 20531107. The next prime is 20531171. The reversal of 20531134 is 43113502.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147637 + ... + 147775.

It is an arithmetic number, because the mean of its divisors is an integer number (768600).

Almost surely, 2^20531134 is an apocalyptic number.

20531134 is a deficient number, since it is larger than the sum of its proper divisors (16361666).

20531134 is a wasteful number, since it uses less digits than its factorization.

20531134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20531134 is about 4531.1294397755. The cubic root of 20531134 is about 273.8236651137.

Adding to 20531134 its reverse (43113502), we get a palindrome (63644636).

The spelling of 20531134 in words is "twenty million, five hundred thirty-one thousand, one hundred thirty-four".