20023454146 has 4 divisors (see below), whose sum is σ = 30035181222. Its totient is φ = 10011727072.

The previous prime is 20023454137. The next prime is 20023454179. The reversal of 20023454146 is 64145432002.

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

It can be written as a sum of positive squares in only one way, i.e., 14909631025 + 5113823121 = 122105^2 + 71511^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005863535 + ... + 5005863538.

Almost surely, 2^20023454146 is an apocalyptic number.

20023454146 is a deficient number, since it is larger than the sum of its proper divisors (10011727076).

20023454146 is a wasteful number, since it uses less digits than its factorization.

20023454146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011727075.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20023454146 its reverse (64145432002), we get a palindrome (84168886148).

The spelling of 20023454146 in words is "twenty billion, twenty-three million, four hundred fifty-four thousand, one hundred forty-six".