21414400024 has 8 divisors (see below), whose sum is σ = 40152000060. Its totient is φ = 10707200008.

The previous prime is 21414400019. The next prime is 21414400027. The reversal of 21414400024 is 42000441412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21414399968 and 21414400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414400027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338399994 + ... + 1338400009.

Almost surely, 2^21414400024 is an apocalyptic number.

It is an amenable number.

21414400024 is a deficient number, since it is larger than the sum of its proper divisors (18737600036).

21414400024 is a wasteful number, since it uses less digits than its factorization.

21414400024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676800009 (or 2676800005 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21414400024 its reverse (42000441412), we get a palindrome (63414841436).

The spelling of 21414400024 in words is "twenty-one billion, four hundred fourteen million, four hundred thousand, twenty-four".