20353045431 has 4 divisors (see below), whose sum is σ = 27137393912. Its totient is φ = 13568696952.

The previous prime is 20353045397. The next prime is 20353045459. The reversal of 20353045431 is 13454035302.

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

It is not a de Polignac number, because 20353045431 - 2¹⁰ = 20353044407 is a prime.

It is a super-2 number, since 2×20353045431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353040431) 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, 3392174236 + ... + 3392174241.

It is an arithmetic number, because the mean of its divisors is an integer number (6784348478).

Almost surely, 2^20353045431 is an apocalyptic number.

20353045431 is a deficient number, since it is larger than the sum of its proper divisors (6784348481).

20353045431 is an equidigital number, since it uses as much as digits as its factorization.

20353045431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6784348480.

The product of its (nonzero) digits is 21600, while the sum is 30.

The spelling of 20353045431 in words is "twenty billion, three hundred fifty-three million, forty-five thousand, four hundred thirty-one".