20134649 has 8 divisors (see below), whose sum is σ = 20694408. Its totient is φ = 19578240.

The previous prime is 20134643. The next prime is 20134663. The reversal of 20134649 is 94643102.

It can be written as a sum of positive squares in 4 ways, for example, as 2131600 + 18003049 = 1460^2 + 4243^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20134649 - 2⁴ = 20134633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20134643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15659 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (2586801).

Almost surely, 2^20134649 is an apocalyptic number.

It is an amenable number.

20134649 is a deficient number, since it is larger than the sum of its proper divisors (559759).

20134649 is a wasteful number, since it uses less digits than its factorization.

20134649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20134649 is about 4487.1649178518. The cubic root of 20134649 is about 272.0495557416.

The spelling of 20134649 in words is "twenty million, one hundred thirty-four thousand, six hundred forty-nine".