20523134 has 8 divisors (see below), whose sum is σ = 30806568. Its totient is φ = 10254280.

The previous prime is 20523127. The next prime is 20523143. The reversal of 20523134 is 43132502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (3850821).

Almost surely, 2^20523134 is an apocalyptic number.

20523134 is a deficient number, since it is larger than the sum of its proper divisors (10283434).

20523134 is a wasteful number, since it uses less digits than its factorization.

20523134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7290.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20523134 is about 4530.2465716559. The cubic root of 20523134 is about 273.7880951689.

Adding to 20523134 its reverse (43132502), we get a palindrome (63655636).

The spelling of 20523134 in words is "twenty million, five hundred twenty-three thousand, one hundred thirty-four".