20003345545 has 16 divisors (see below), whose sum is σ = 25846801920. Its totient is φ = 14806061824.

The previous prime is 20003345519. The next prime is 20003345581. The reversal of 20003345545 is 54554330002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20003345545 - 2¹¹ = 20003343497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1989337 + ... + 1999366.

It is an arithmetic number, because the mean of its divisors is an integer number (1615425120).

Almost surely, 2^20003345545 is an apocalyptic number.

It is an amenable number.

20003345545 is a deficient number, since it is larger than the sum of its proper divisors (5843456375).

20003345545 is a wasteful number, since it uses less digits than its factorization.

20003345545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3988784.

The product of its (nonzero) digits is 36000, while the sum is 31.

Adding to 20003345545 its reverse (54554330002), we get a palindrome (74557675547).

The spelling of 20003345545 in words is "twenty billion, three million, three hundred forty-five thousand, five hundred forty-five".