21536343307 has 8 divisors (see below), whose sum is σ = 22675553360. Its totient is φ = 20397705120.

The previous prime is 21536343289. The next prime is 21536343373. The reversal of 21536343307 is 70334363512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21536343307 - 2²³ = 21527954699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21536343407) 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, 64548 + ... + 217345.

It is an arithmetic number, because the mean of its divisors is an integer number (2834444170).

Almost surely, 2^21536343307 is an apocalyptic number.

21536343307 is a deficient number, since it is larger than the sum of its proper divisors (1139210053).

21536343307 is a wasteful number, since it uses less digits than its factorization.

21536343307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285933.

The product of its (nonzero) digits is 136080, while the sum is 37.

The spelling of 21536343307 in words is "twenty-one billion, five hundred thirty-six million, three hundred forty-three thousand, three hundred seven".