21405330754 has 8 divisors (see below), whose sum is σ = 32122266768. Its totient is φ = 10697908500.

The previous prime is 21405330731. The next prime is 21405330767. The reversal of 21405330754 is 45703350412.

21405330754 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

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, 2372812 + ... + 2381815.

It is an arithmetic number, because the mean of its divisors is an integer number (4015283346).

Almost surely, 2^21405330754 is an apocalyptic number.

21405330754 is a deficient number, since it is larger than the sum of its proper divisors (10716936014).

21405330754 is a wasteful number, since it uses less digits than its factorization.

21405330754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756880.

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 21405330754 in words is "twenty-one billion, four hundred five million, three hundred thirty thousand, seven hundred fifty-four".