20021011332313 has 16 divisors (see below), whose sum is σ = 20468790896256. Its totient is φ = 19578085098880.

The previous prime is 20021011332307. The next prime is 20021011332331. The reversal of 20021011332313 is 31323311012002.

It is a cyclic number.

It is not a de Polignac number, because 20021011332313 - 2²⁵ = 20020977777881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021011332713) 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, 10427595 + ... + 12197407.

It is an arithmetic number, because the mean of its divisors is an integer number (1279299431016).

Almost surely, 2^{20021011332313} is an apocalyptic number.

It is an amenable number.

20021011332313 is a deficient number, since it is larger than the sum of its proper divisors (447779563943).

20021011332313 is a wasteful number, since it uses less digits than its factorization.

20021011332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771184.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20021011332313 its reverse (31323311012002), we get a palindrome (51344322344315).

The spelling of 20021011332313 in words is "twenty trillion, twenty-one billion, eleven million, three hundred thirty-two thousand, three hundred thirteen".