20020323011 has 4 divisors (see below), whose sum is σ = 21560347872. Its totient is φ = 18480298152.

The previous prime is 20020322947. The next prime is 20020323023. The reversal of 20020323011 is 11032302002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20020323011 - 2⁶ = 20020322947 is a prime.

It is a super-2 number, since 2×20020323011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020323041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770012411 + ... + 770012436.

It is an arithmetic number, because the mean of its divisors is an integer number (5390086968).

Almost surely, 2^20020323011 is an apocalyptic number.

20020323011 is a deficient number, since it is larger than the sum of its proper divisors (1540024861).

20020323011 is a wasteful number, since it uses less digits than its factorization.

20020323011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540024860.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20020323011 its reverse (11032302002), we get a palindrome (31052625013).

The spelling of 20020323011 in words is "twenty billion, twenty million, three hundred twenty-three thousand, eleven".