21422030551 has 16 divisors (see below), whose sum is σ = 22156219008. Its totient is φ = 20699128800.

The previous prime is 21422030549. The next prime is 21422030557. The reversal of 21422030551 is 15503022412.

It is a cyclic number.

It is not a de Polignac number, because 21422030551 - 2¹ = 21422030549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422030557) 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 15 ways as a sum of consecutive naturals, for example, 3728541 + ... + 3734281.

It is an arithmetic number, because the mean of its divisors is an integer number (1384763688).

Almost surely, 2^21422030551 is an apocalyptic number.

21422030551 is a deficient number, since it is larger than the sum of its proper divisors (734188457).

21422030551 is a wasteful number, since it uses less digits than its factorization.

21422030551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6702.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21422030551 its reverse (15503022412), we get a palindrome (36925052963).

The spelling of 21422030551 in words is "twenty-one billion, four hundred twenty-two million, thirty thousand, five hundred fifty-one".