21444502434 has 16 divisors (see below), whose sum is σ = 43125962880. Its totient is φ = 7108674480.

The previous prime is 21444502421. The next prime is 21444502447. The reversal of 21444502434 is 43420544412.

It is an interprime number because it is at equal distance from previous prime (21444502421) and next prime (21444502447).

It is a junction number, because it is equal to n+sod(n) for n = 21444502395 and 21444502404.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9872074 + ... + 9874245.

It is an arithmetic number, because the mean of its divisors is an integer number (2695372680).

Almost surely, 2^21444502434 is an apocalyptic number.

21444502434 is an abundant number, since it is smaller than the sum of its proper divisors (21681460446).

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

21444502434 is a wasteful number, since it uses less digits than its factorization.

21444502434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19746505.

The product of its (nonzero) digits is 61440, while the sum is 33.

The spelling of 21444502434 in words is "twenty-one billion, four hundred forty-four million, five hundred two thousand, four hundred thirty-four".