20602813 has 8 divisors (see below), whose sum is σ = 25686720. Its totient is φ = 16054080.

The previous prime is 20602807. The next prime is 20602823. The reversal of 20602813 is 31820602.

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

It is a de Polignac number, because none of the positive numbers 2^k-20602813 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 (20602823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133708 + ... + 133861.

It is an arithmetic number, because the mean of its divisors is an integer number (3210840).

Almost surely, 2^20602813 is an apocalyptic number.

It is an amenable number.

20602813 is a deficient number, since it is larger than the sum of its proper divisors (5083907).

20602813 is a wasteful number, since it uses less digits than its factorization.

20602813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267587.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20602813 is about 4539.0321655613. The cubic root of 20602813 is about 274.1419558520.

The spelling of 20602813 in words is "twenty million, six hundred two thousand, eight hundred thirteen".