20213031011 has 4 divisors (see below), whose sum is σ = 20421412872. Its totient is φ = 20004649152.

The previous prime is 20213030989. The next prime is 20213031071. The reversal of 20213031011 is 11013031202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11013031202 = 2 ⋅5506515601.

It is a cyclic number.

It is not a de Polignac number, because 20213031011 - 2⁶ = 20213030947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213031071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104190785 + ... + 104190978.

It is an arithmetic number, because the mean of its divisors is an integer number (5105353218).

Almost surely, 2^20213031011 is an apocalyptic number.

20213031011 is a deficient number, since it is larger than the sum of its proper divisors (208381861).

20213031011 is an equidigital number, since it uses as much as digits as its factorization.

20213031011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208381860.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20213031011 its reverse (11013031202), we get a palindrome (31226062213).

The spelling of 20213031011 in words is "twenty billion, two hundred thirteen million, thirty-one thousand, eleven".