21408881260742 has 8 divisors (see below), whose sum is σ = 32122797652800. Its totient is φ = 10701282043144.

The previous prime is 21408881260651. The next prime is 21408881260777. The reversal of 21408881260742 is 24706218880412.

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

It is a congruent number.

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, 1579285142 + ... + 1579298697.

It is an arithmetic number, because the mean of its divisors is an integer number (4015349706600).

Almost surely, 2^{21408881260742} is an apocalyptic number.

21408881260742 is a deficient number, since it is larger than the sum of its proper divisors (10713916392058).

21408881260742 is a wasteful number, since it uses less digits than its factorization.

21408881260742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158587230.

The product of its (nonzero) digits is 2752512, while the sum is 53.

The spelling of 21408881260742 in words is "twenty-one trillion, four hundred eight billion, eight hundred eighty-one million, two hundred sixty thousand, seven hundred forty-two".