19820313 has 12 divisors (see below), whose sum is σ = 28884180. Its totient is φ = 13095936.

The previous prime is 19820299. The next prime is 19820327. The reversal of 19820313 is 31302891.

It is an interprime number because it is at equal distance from previous prime (19820299) and next prime (19820327).

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 19474569 = 588^2 + 4413^2 .

It is not a de Polignac number, because 19820313 - 2⁸ = 19820057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19820513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8728 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (2407015).

Almost surely, 2^19820313 is an apocalyptic number.

It is an amenable number.

19820313 is a deficient number, since it is larger than the sum of its proper divisors (9063867).

19820313 is a wasteful number, since it uses less digits than its factorization.

19820313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19608 (or 19605 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 19820313 is about 4452.0010107816. The cubic root of 19820313 is about 270.6264056841.

The spelling of 19820313 in words is "nineteen million, eight hundred twenty thousand, three hundred thirteen".