19702013 has 4 divisors (see below), whose sum is σ = 19719420. Its totient is φ = 19684608.

The previous prime is 19702009. The next prime is 19702021. The reversal of 19702013 is 31020791.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7991929 + 11710084 = 2827^2 + 3422^2 .

It is a cyclic number.

It is not a de Polignac number, because 19702013 - 2² = 19702009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19702013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19702063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6878 + ... + 9311.

It is an arithmetic number, because the mean of its divisors is an integer number (4929855).

Almost surely, 2^19702013 is an apocalyptic number.

It is an amenable number.

19702013 is a deficient number, since it is larger than the sum of its proper divisors (17407).

19702013 is a wasteful number, since it uses less digits than its factorization.

19702013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17406.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 19702013 is about 4438.6949658655. The cubic root of 19702013 is about 270.0869084652.

The spelling of 19702013 in words is "nineteen million, seven hundred two thousand, thirteen".