21444122430 has 24 divisors (see below), whose sum is σ = 55754718552. Its totient is φ = 5718432624.

The previous prime is 21444122411. The next prime is 21444122431. The reversal of 21444122430 is 3422144412.

21444122430 is a `hidden beast` number, since 2 + 1 + 4 + 4 + 412 + 243 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21444122394 and 21444122403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444122431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119133924 + ... + 119134103.

It is an arithmetic number, because the mean of its divisors is an integer number (2323113273).

Almost surely, 2^21444122430 is an apocalyptic number.

21444122430 is an abundant number, since it is smaller than the sum of its proper divisors (34310596122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21444122430 is a wasteful number, since it uses less digits than its factorization.

21444122430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238268040 (or 238268037 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21444122430 its reverse (3422144412), we get a palindrome (24866266842).

The spelling of 21444122430 in words is "twenty-one billion, four hundred forty-four million, one hundred twenty-two thousand, four hundred thirty".