21601883445 has 8 divisors (see below), whose sum is σ = 34563013536. Its totient is φ = 11521004496.

The previous prime is 21601883441. The next prime is 21601883461. The reversal of 21601883445 is 54438810612.

It is a happy number.

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

It is not a de Polignac number, because 21601883445 - 2² = 21601883441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21601883397 and 21601883406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21601883441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720062767 + ... + 720062796.

It is an arithmetic number, because the mean of its divisors is an integer number (4320376692).

Almost surely, 2^21601883445 is an apocalyptic number.

It is an amenable number.

21601883445 is a deficient number, since it is larger than the sum of its proper divisors (12961130091).

21601883445 is a wasteful number, since it uses less digits than its factorization.

21601883445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440125571.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 21601883445 in words is "twenty-one billion, six hundred one million, eight hundred eighty-three thousand, four hundred forty-five".