20013320002 has 16 divisors (see below), whose sum is σ = 32377275000. Its totient is φ = 9223183872.

The previous prime is 20013319999. The next prime is 20013320009. The reversal of 20013320002 is 20002331002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8297205921 + 11716114081 = 91089^2 + 108241^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (20013320009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554377 + ... + 589372.

Almost surely, 2^20013320002 is an apocalyptic number.

20013320002 is a deficient number, since it is larger than the sum of its proper divisors (12363954998).

20013320002 is a wasteful number, since it uses less digits than its factorization.

20013320002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144437.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20013320002 its reverse (20002331002), we get a palindrome (40015651004).

The spelling of 20013320002 in words is "twenty billion, thirteen million, three hundred twenty thousand, two".