20213420440031 has 16 divisors (see below), whose sum is σ = 25456615371264. Its totient is φ = 15621104880864.

The previous prime is 20213420440027. The next prime is 20213420440049. The reversal of 20213420440031 is 13004402431202.

It is not a de Polignac number, because 20213420440031 - 2² = 20213420440027 is a prime.

It is a super-2 number, since 2×20213420440031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213423440031) 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, 2582850731 + ... + 2582858556.

It is an arithmetic number, because the mean of its divisors is an integer number (1591038460704).

Almost surely, 2^{20213420440031} is an apocalyptic number.

20213420440031 is a deficient number, since it is larger than the sum of its proper divisors (5243194931233).

20213420440031 is a wasteful number, since it uses less digits than its factorization.

20213420440031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5165709350.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20213420440031 its reverse (13004402431202), we get a palindrome (33217822871233).

The spelling of 20213420440031 in words is "twenty trillion, two hundred thirteen billion, four hundred twenty million, four hundred forty thousand, thirty-one".