20113357969 has 4 divisors (see below), whose sum is σ = 20762176000. Its totient is φ = 19464539940.

The previous prime is 20113357967. The next prime is 20113358071. The reversal of 20113357969 is 96975331102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20113357969 - 2¹ = 20113357967 is a prime.

It is a super-2 number, since 2×20113357969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113357967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324408969 + ... + 324409030.

It is an arithmetic number, because the mean of its divisors is an integer number (5190544000).

Almost surely, 2^20113357969 is an apocalyptic number.

It is an amenable number.

20113357969 is a deficient number, since it is larger than the sum of its proper divisors (648818031).

20113357969 is an equidigital number, since it uses as much as digits as its factorization.

20113357969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648818030.

The product of its (nonzero) digits is 306180, while the sum is 46.

The spelling of 20113357969 in words is "twenty billion, one hundred thirteen million, three hundred fifty-seven thousand, nine hundred sixty-nine".