21149347330 has 8 divisors (see below), whose sum is σ = 38068825212. Its totient is φ = 8459738928.

The previous prime is 21149347319. The next prime is 21149347409. The reversal of 21149347330 is 3374394112.

It can be written as a sum of positive squares in 2 ways, for example, as 19687737969 + 1461609361 = 140313^2 + 38231^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21149347330.

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, 1057467357 + ... + 1057467376.

Almost surely, 2^21149347330 is an apocalyptic number.

21149347330 is a deficient number, since it is larger than the sum of its proper divisors (16919477882).

21149347330 is a wasteful number, since it uses less digits than its factorization.

21149347330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114934740.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 21149347330 in words is "twenty-one billion, one hundred forty-nine million, three hundred forty-seven thousand, three hundred thirty".