21730349332 has 6 divisors (see below), whose sum is σ = 38028111338. Its totient is φ = 10865174664.

The previous prime is 21730349261. The next prime is 21730349357. The reversal of 21730349332 is 23394303712.

It can be written as a sum of positive squares in only one way, i.e., 17764624656 + 3965724676 = 133284^2 + 62974^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21730349291 and 21730349300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2716293663 + ... + 2716293670.

Almost surely, 2^21730349332 is an apocalyptic number.

It is an amenable number.

21730349332 is a deficient number, since it is larger than the sum of its proper divisors (16297762006).

21730349332 is a wasteful number, since it uses less digits than its factorization.

21730349332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432587337 (or 5432587335 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 37.

The spelling of 21730349332 in words is "twenty-one billion, seven hundred thirty million, three hundred forty-nine thousand, three hundred thirty-two".