21470654742 has 32 divisors (see below), whose sum is σ = 44111548512. Its totient is φ = 6961929984.

The previous prime is 21470654719. The next prime is 21470654771. The reversal of 21470654742 is 24745607412.

It is a junction number, because it is equal to n+sod(n) for n = 21470654694 and 21470654703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1469698 + ... + 1484234.

It is an arithmetic number, because the mean of its divisors is an integer number (1378485891).

Almost surely, 2^21470654742 is an apocalyptic number.

21470654742 is an abundant number, since it is smaller than the sum of its proper divisors (22640893770).

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

21470654742 is a wasteful number, since it uses less digits than its factorization.

21470654742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21232.

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 21470654742 in words is "twenty-one billion, four hundred seventy million, six hundred fifty-four thousand, seven hundred forty-two".