20494697 has 8 divisors (see below), whose sum is σ = 20992416. Its totient is φ = 20002752.

The previous prime is 20494667. The next prime is 20494699. The reversal of 20494697 is 79649402.

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 20494697 - 2¹² = 20490601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20494699) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6218 + ... + 8924.

It is an arithmetic number, because the mean of its divisors is an integer number (2624052).

Almost surely, 2^20494697 is an apocalyptic number.

It is an amenable number.

20494697 is a deficient number, since it is larger than the sum of its proper divisors (497719).

20494697 is a wasteful number, since it uses less digits than its factorization.

20494697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 20494697 is about 4527.1069128087. The cubic root of 20494697 is about 273.6615824766.

The spelling of 20494697 in words is "twenty million, four hundred ninety-four thousand, six hundred ninety-seven".