21485806111742 has 64 divisors (see below), whose sum is σ = 38933930780160. Its totient is φ = 8687022940800.

The previous prime is 21485806111717. The next prime is 21485806111747. The reversal of 21485806111742 is 24711160858412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485806111747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128196617 + ... + 128364107.

It is an arithmetic number, because the mean of its divisors is an integer number (608342668440).

Almost surely, 2^{21485806111742} is an apocalyptic number.

21485806111742 is a deficient number, since it is larger than the sum of its proper divisors (17448124668418).

21485806111742 is a wasteful number, since it uses less digits than its factorization.

21485806111742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169537.

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 21485806111742 in words is "twenty-one trillion, four hundred eighty-five billion, eight hundred six million, one hundred eleven thousand, seven hundred forty-two".