20604291 has 8 divisors (see below), whose sum is σ = 27505680. Its totient is φ = 13719552.

The previous prime is 20604277. The next prime is 20604299. The reversal of 20604291 is 19240602.

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

It is not a de Polignac number, because 20604291 - 2¹¹ = 20602243 is a prime.

It is a super-2 number, since 2×20604291² = 849073615225362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20604299) 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, 910 + ... + 6483.

It is an arithmetic number, because the mean of its divisors is an integer number (3438210).

Almost surely, 2^20604291 is an apocalyptic number.

20604291 is a deficient number, since it is larger than the sum of its proper divisors (6901389).

20604291 is an equidigital number, since it uses as much as digits as its factorization.

20604291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20604291 is about 4539.1949726796. The cubic root of 20604291 is about 274.1485111401.

Adding to 20604291 its reverse (19240602), we get a palindrome (39844893).

The spelling of 20604291 in words is "twenty million, six hundred four thousand, two hundred ninety-one".