2002023545 has 4 divisors (see below), whose sum is σ = 2402428260. Its totient is φ = 1601618832.

The previous prime is 2002023487. The next prime is 2002023553. The reversal of 2002023545 is 5453202002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1527480889 + 474542656 = 39083^2 + 21784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002023545 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002023545.

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, 200202350 + ... + 200202359.

It is an arithmetic number, because the mean of its divisors is an integer number (600607065).

Almost surely, 2^2002023545 is an apocalyptic number.

It is an amenable number.

2002023545 is a deficient number, since it is larger than the sum of its proper divisors (400404715).

2002023545 is an equidigital number, since it uses as much as digits as its factorization.

2002023545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400404714.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 2002023545 is about 44743.9777512013. The cubic root of 2002023545 is about 1260.3458244921.

Adding to 2002023545 its reverse (5453202002), we get a palindrome (7455225547).

The spelling of 2002023545 in words is "two billion, two million, twenty-three thousand, five hundred forty-five".