21433422031 has 16 divisors (see below), whose sum is σ = 25142842368. Its totient is φ = 17887665600.

The previous prime is 21433421983. The next prime is 21433422037. The reversal of 21433422031 is 13022433412.

It is not a de Polignac number, because 21433422031 - 2¹³ = 21433413839 is a prime.

It is a super-2 number, since 2×21433422031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21433421987 and 21433422005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433422037) 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 15 ways as a sum of consecutive naturals, for example, 70126 + ... + 218596.

It is an arithmetic number, because the mean of its divisors is an integer number (1571427648).

Almost surely, 2^21433422031 is an apocalyptic number.

21433422031 is a deficient number, since it is larger than the sum of its proper divisors (3709420337).

21433422031 is a wasteful number, since it uses less digits than its factorization.

21433422031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149022.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21433422031 its reverse (13022433412), we get a palindrome (34455855443).

The spelling of 21433422031 in words is "twenty-one billion, four hundred thirty-three million, four hundred twenty-two thousand, thirty-one".