20353368349 has 4 divisors (see below), whose sum is σ = 20353748800. Its totient is φ = 20352987900.

The previous prime is 20353368317. The next prime is 20353368383. The reversal of 20353368349 is 94386335302.

It is a happy number.

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 20353368349 - 2⁵ = 20353368317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20353368299 and 20353368308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353368389) 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, 93627 + ... + 222424.

It is an arithmetic number, because the mean of its divisors is an integer number (5088437200).

Almost surely, 2^20353368349 is an apocalyptic number.

It is an amenable number.

20353368349 is a deficient number, since it is larger than the sum of its proper divisors (380451).

20353368349 is an equidigital number, since it uses as much as digits as its factorization.

20353368349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380450.

The product of its (nonzero) digits is 1399680, while the sum is 46.

The spelling of 20353368349 in words is "twenty billion, three hundred fifty-three million, three hundred sixty-eight thousand, three hundred forty-nine".