20494090 has 8 divisors (see below), whose sum is σ = 36889380. Its totient is φ = 8197632.

The previous prime is 20494051. The next prime is 20494139. The reversal of 20494090 is 9049402.

It can be written as a sum of positive squares in 2 ways, for example, as 20493729 + 361 = 4527^2 + 19^2 .

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

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, 1024695 + ... + 1024714.

Almost surely, 2^20494090 is an apocalyptic number.

20494090 is a deficient number, since it is larger than the sum of its proper divisors (16395290).

20494090 is a wasteful number, since it uses less digits than its factorization.

20494090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049416.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20494090 is about 4527.0398717042. The cubic root of 20494090 is about 273.6588807335.

The spelling of 20494090 in words is "twenty million, four hundred ninety-four thousand, ninety".