21024415344 has 40 divisors (see below), whose sum is σ = 57171658240. Its totient is φ = 6639288768.

The previous prime is 21024415339. The next prime is 21024415351. The reversal of 21024415344 is 44351442012.

It is a congruent number.

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, 11525632 + ... + 11527455.

It is an arithmetic number, because the mean of its divisors is an integer number (1429291456).

Almost surely, 2^21024415344 is an apocalyptic number.

21024415344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21024415344 is an abundant number, since it is smaller than the sum of its proper divisors (36147242896).

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

21024415344 is a wasteful number, since it uses less digits than its factorization.

21024415344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23053117 (or 23053111 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21024415344 its reverse (44351442012), we get a palindrome (65375857356).

The spelling of 21024415344 in words is "twenty-one billion, twenty-four million, four hundred fifteen thousand, three hundred forty-four".