21103044024 has 32 divisors (see below), whose sum is σ = 52767141120. Its totient is φ = 7033077216.

The previous prime is 21103044007. The next prime is 21103044029. The reversal of 21103044024 is 42044030112.

It is a super-2 number, since 2×21103044024² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103044029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61279 + ... + 214385.

It is an arithmetic number, because the mean of its divisors is an integer number (1648973160).

Almost surely, 2^21103044024 is an apocalyptic number.

21103044024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21103044024 is an abundant number, since it is smaller than the sum of its proper divisors (31664097096).

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

21103044024 is a wasteful number, since it uses less digits than its factorization.

21103044024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158859 (or 158855 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21103044024 its reverse (42044030112), we get a palindrome (63147074136).

The spelling of 21103044024 in words is "twenty-one billion, one hundred three million, forty-four thousand, twenty-four".