20313049 has 3 divisors (see below), whose sum is σ = 20317557. Its totient is φ = 20308542.

The previous prime is 20313047. The next prime is 20313067. The reversal of 20313049 is 94031302.

The square root of 20313049 is 4507.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 20313049 - 2¹ = 20313047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20313047) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2254 + ... + 6760.

It is an arithmetic number, because the mean of its divisors is an integer number (6772519).

Almost surely, 2^20313049 is an apocalyptic number.

20313049 is the 4507-th square number.

20313049 is the 2254-th centered octagonal number.

It is an amenable number.

20313049 is a deficient number, since it is larger than the sum of its proper divisors (4508).

20313049 is an frugal number, since it uses more digits than its factorization.

20313049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The cubic root of 20313049 is about 272.8506788957.

The spelling of 20313049 in words is "twenty million, three hundred thirteen thousand, forty-nine".