20523000045 has 8 divisors (see below), whose sum is σ = 32836800096. Its totient is φ = 10945600016.

The previous prime is 20523000037. The next prime is 20523000059. The reversal of 20523000045 is 54000032502.

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

It is a cyclic number.

It is not a de Polignac number, because 20523000045 - 2³ = 20523000037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20522999985 and 20523000030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684099987 + ... + 684100016.

It is an arithmetic number, because the mean of its divisors is an integer number (4104600012).

Almost surely, 2^20523000045 is an apocalyptic number.

It is an amenable number.

20523000045 is a deficient number, since it is larger than the sum of its proper divisors (12313800051).

20523000045 is a wasteful number, since it uses less digits than its factorization.

20523000045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368200011.

The product of its (nonzero) digits is 1200, while the sum is 21.

Adding to 20523000045 its reverse (54000032502), we get a palindrome (74523032547).

The spelling of 20523000045 in words is "twenty billion, five hundred twenty-three million, forty-five", and thus it is an aban number.