21790341472 has 24 divisors (see below), whose sum is σ = 42992821872. Its totient is φ = 10871529600.

The previous prime is 21790341467. The next prime is 21790341491. The reversal of 21790341472 is 27414309712.

It is a happy number.

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, 723804 + ... + 753307.

It is an arithmetic number, because the mean of its divisors is an integer number (1791367578).

Almost surely, 2^21790341472 is an apocalyptic number.

It is an amenable number.

21790341472 is a deficient number, since it is larger than the sum of its proper divisors (21202480400).

21790341472 is a wasteful number, since it uses less digits than its factorization.

21790341472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477582 (or 1477574 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 21790341472 in words is "twenty-one billion, seven hundred ninety million, three hundred forty-one thousand, four hundred seventy-two".