20517134 has 8 divisors (see below), whose sum is σ = 33573528. Its totient is φ = 9325960.

The previous prime is 20517121. The next prime is 20517157. The reversal of 20517134 is 43171502.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466277 + ... + 466320.

It is an arithmetic number, because the mean of its divisors is an integer number (4196691).

Almost surely, 2^20517134 is an apocalyptic number.

20517134 is a deficient number, since it is larger than the sum of its proper divisors (13056394).

20517134 is a wasteful number, since it uses less digits than its factorization.

20517134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932610.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20517134 is about 4529.5843076380. The cubic root of 20517134 is about 273.7614116439.

Adding to 20517134 its reverse (43171502), we get a palindrome (63688636).

The spelling of 20517134 in words is "twenty million, five hundred seventeen thousand, one hundred thirty-four".