21404024034 has 8 divisors (see below), whose sum is σ = 42808048080. Its totient is φ = 7134674676.

The previous prime is 21404024021. The next prime is 21404024051. The reversal of 21404024034 is 43042040412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21404024034 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21404023995 and 21404024013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1783668664 + ... + 1783668675.

It is an arithmetic number, because the mean of its divisors is an integer number (5351006010).

Almost surely, 2^21404024034 is an apocalyptic number.

21404024034 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21404024034 is a wasteful number, since it uses less digits than its factorization.

21404024034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567337344.

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

Adding to 21404024034 its reverse (43042040412), we get a palindrome (64446064446).

The spelling of 21404024034 in words is "twenty-one billion, four hundred four million, twenty-four thousand, thirty-four".