20145434446 has 8 divisors (see below), whose sum is σ = 30229322760. Its totient is φ = 10068993528.

The previous prime is 20145434417. The next prime is 20145434471. The reversal of 20145434446 is 64443454102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1855081 + ... + 1865908.

It is an arithmetic number, because the mean of its divisors is an integer number (3778665345).

Almost surely, 2^20145434446 is an apocalyptic number.

20145434446 is a deficient number, since it is larger than the sum of its proper divisors (10083888314).

20145434446 is a wasteful number, since it uses less digits than its factorization.

20145434446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3723698.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 20145434446 its reverse (64443454102), we get a palindrome (84588888548).

The spelling of 20145434446 in words is "twenty billion, one hundred forty-five million, four hundred thirty-four thousand, four hundred forty-six".