20790479 has 4 divisors (see below), whose sum is σ = 21142920. Its totient is φ = 20438040.

The previous prime is 20790467. The next prime is 20790527. The reversal of 20790479 is 97409702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20790479 - 2¹⁶ = 20724943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176132 + ... + 176249.

It is an arithmetic number, because the mean of its divisors is an integer number (5285730).

Almost surely, 2^20790479 is an apocalyptic number.

20790479 is a deficient number, since it is larger than the sum of its proper divisors (352441).

20790479 is an equidigital number, since it uses as much as digits as its factorization.

20790479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352440.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 20790479 is about 4559.6577722456. The cubic root of 20790479 is about 274.9718053739.

The spelling of 20790479 in words is "twenty million, seven hundred ninety thousand, four hundred seventy-nine".