20020320111001 has 16 divisors (see below), whose sum is σ = 23347646694400. Its totient is φ = 17160028441920.

The previous prime is 20020320110957. The next prime is 20020320111019. The reversal of 20020320111001 is 10011102302002.

It is not a de Polignac number, because 20020320111001 - 2¹¹ = 20020320108953 is a prime.

It is a super-2 number, since 2×20020320111001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20020320111041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25973185 + ... + 26732881.

It is an arithmetic number, because the mean of its divisors is an integer number (1459227918400).

Almost surely, 2^{20020320111001} is an apocalyptic number.

It is an amenable number.

20020320111001 is a deficient number, since it is larger than the sum of its proper divisors (3327326583399).

20020320111001 is an frugal number, since it uses more digits than its factorization.

20020320111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836549 (or 836535 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20020320111001 its reverse (10011102302002), we get a palindrome (30031422413003).

The spelling of 20020320111001 in words is "twenty trillion, twenty billion, three hundred twenty million, one hundred eleven thousand, one".