20003600545 has 16 divisors (see below), whose sum is σ = 25430197968. Its totient is φ = 15053322240.

The previous prime is 20003600531. The next prime is 20003600621. The reversal of 20003600545 is 54500630002.

It can be written as a sum of positive squares in 8 ways, for example, as 3394577169 + 16609023376 = 58263^2 + 128876^2 .

It is not a de Polignac number, because 20003600545 - 2⁷ = 20003600417 is a prime.

It is a Duffinian number.

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, 94957 + ... + 221413.

It is an arithmetic number, because the mean of its divisors is an integer number (1589387373).

Almost surely, 2^20003600545 is an apocalyptic number.

It is an amenable number.

20003600545 is a deficient number, since it is larger than the sum of its proper divisors (5426597423).

20003600545 is a wasteful number, since it uses less digits than its factorization.

20003600545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128340.

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 20003600545 in words is "twenty billion, three million, six hundred thousand, five hundred forty-five".