20212244431 has 4 divisors (see below), whose sum is σ = 20213060200. Its totient is φ = 20211428664.

The previous prime is 20212244419. The next prime is 20212244461. The reversal of 20212244431 is 13444221202.

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 20212244431 - 2⁵ = 20212244399 is a prime.

It is a super-2 number, since 2×20212244431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212244396 and 20212244405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212244461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369516 + ... + 420673.

It is an arithmetic number, because the mean of its divisors is an integer number (5053265050).

Almost surely, 2^20212244431 is an apocalyptic number.

20212244431 is a deficient number, since it is larger than the sum of its proper divisors (815769).

20212244431 is an equidigital number, since it uses as much as digits as its factorization.

20212244431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815768.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20212244431 its reverse (13444221202), we get a palindrome (33656465633).

The spelling of 20212244431 in words is "twenty billion, two hundred twelve million, two hundred forty-four thousand, four hundred thirty-one".