21488816316742 has 8 divisors (see below), whose sum is σ = 32233244700600. Its totient is φ = 10744401416544.

The previous prime is 21488816316719. The next prime is 21488816316791. The reversal of 21488816316742 is 24761361888412.

It is a happy number.

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, 3090009 + ... + 7247467.

It is an arithmetic number, because the mean of its divisors is an integer number (4029155587575).

Almost surely, 2^{21488816316742} is an apocalyptic number.

21488816316742 is a deficient number, since it is larger than the sum of its proper divisors (10744428383858).

21488816316742 is a wasteful number, since it uses less digits than its factorization.

21488816316742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741830.

The product of its digits is 24772608, while the sum is 61.

The spelling of 21488816316742 in words is "twenty-one trillion, four hundred eighty-eight billion, eight hundred sixteen million, three hundred sixteen thousand, seven hundred forty-two".