20002045453 has 8 divisors (see below), whose sum is σ = 22807762488. Its totient is φ = 17377342464.

The previous prime is 20002045411. The next prime is 20002045477. The reversal of 20002045453 is 35454020002.

It can be written as a sum of positive squares in 4 ways, for example, as 1331009289 + 18671036164 = 36483^2 + 136642^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002045453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002045403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45253276 + ... + 45253717.

It is an arithmetic number, because the mean of its divisors is an integer number (2850970311).

Almost surely, 2^20002045453 is an apocalyptic number.

It is an amenable number.

20002045453 is a deficient number, since it is larger than the sum of its proper divisors (2805717035).

20002045453 is a wasteful number, since it uses less digits than its factorization.

20002045453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90507023.

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20002045453 its reverse (35454020002), we get a palindrome (55456065455).

The spelling of 20002045453 in words is "twenty billion, two million, forty-five thousand, four hundred fifty-three".