21402034224 has 40 divisors (see below), whose sum is σ = 55404072960. Its totient is φ = 7119110208.

The previous prime is 21402034219. The next prime is 21402034243. The reversal of 21402034224 is 42243020412.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21402034194 and 21402034203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442432 + ... + 488415.

It is an arithmetic number, because the mean of its divisors is an integer number (1385101824).

Almost surely, 2^21402034224 is an apocalyptic number.

21402034224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21402034224 is an abundant number, since it is smaller than the sum of its proper divisors (34002038736).

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

21402034224 is a wasteful number, since it uses less digits than its factorization.

21402034224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931337 (or 931331 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21402034224 its reverse (42243020412), we get a palindrome (63645054636).

The spelling of 21402034224 in words is "twenty-one billion, four hundred two million, thirty-four thousand, two hundred twenty-four".