21424102144 has 18 divisors (see below), whose sum is σ = 42764516900. Its totient is φ = 10712050944.

The previous prime is 21424102111. The next prime is 21424102159. The reversal of 21424102144 is 44120142412.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41843694 + ... + 41844205.

Almost surely, 2^21424102144 is an apocalyptic number.

It is an amenable number.

21424102144 is a deficient number, since it is larger than the sum of its proper divisors (21340414756).

21424102144 is an frugal number, since it uses more digits than its factorization.

21424102144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83687915 (or 83687901 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21424102144 its reverse (44120142412), we get a palindrome (65544244556).

The spelling of 21424102144 in words is "twenty-one billion, four hundred twenty-four million, one hundred two thousand, one hundred forty-four".