21357711059 has 4 divisors (see below), whose sum is σ = 22286307216. Its totient is φ = 20429114904.

The previous prime is 21357711049. The next prime is 21357711119. The reversal of 21357711059 is 95011775312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21357711059 - 2⁴ = 21357711043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21357711049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464298044 + ... + 464298089.

It is an arithmetic number, because the mean of its divisors is an integer number (5571576804).

Almost surely, 2^21357711059 is an apocalyptic number.

21357711059 is a deficient number, since it is larger than the sum of its proper divisors (928596157).

21357711059 is an equidigital number, since it uses as much as digits as its factorization.

21357711059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928596156.

The product of its (nonzero) digits is 66150, while the sum is 41.

The spelling of 21357711059 in words is "twenty-one billion, three hundred fifty-seven million, seven hundred eleven thousand, fifty-nine".