20223431645 has 8 divisors (see below), whose sum is σ = 24269606880. Its totient is φ = 16177752720.

The previous prime is 20223431633. The next prime is 20223431729. The reversal of 20223431645 is 54613432202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20223431645 - 2³⁰ = 19149689821 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27611 + ... + 203000.

It is an arithmetic number, because the mean of its divisors is an integer number (3033700860).

Almost surely, 2^20223431645 is an apocalyptic number.

It is an amenable number.

20223431645 is a deficient number, since it is larger than the sum of its proper divisors (4046175235).

20223431645 is a wasteful number, since it uses less digits than its factorization.

20223431645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248155.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 20223431645 its reverse (54613432202), we get a palindrome (74836863847).

The spelling of 20223431645 in words is "twenty billion, two hundred twenty-three million, four hundred thirty-one thousand, six hundred forty-five".