20213565105 has 8 divisors (see below), whose sum is σ = 32341704192. Its totient is φ = 10780568048.

The previous prime is 20213565089. The next prime is 20213565109. The reversal of 20213565105 is 50156531202.

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 20213565105 - 2⁴ = 20213565089 is a prime.

It is a super-2 number, since 2×20213565105² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20213565109) 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, 673785489 + ... + 673785518.

It is an arithmetic number, because the mean of its divisors is an integer number (4042713024).

Almost surely, 2^20213565105 is an apocalyptic number.

It is an amenable number.

20213565105 is a deficient number, since it is larger than the sum of its proper divisors (12128139087).

20213565105 is a wasteful number, since it uses less digits than its factorization.

20213565105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347571015.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 20213565105 in words is "twenty billion, two hundred thirteen million, five hundred sixty-five thousand, one hundred five".