20253734603 has 4 divisors (see below), whose sum is σ = 20382739440. Its totient is φ = 20124729768.

The previous prime is 20253734597. The next prime is 20253734629. The reversal of 20253734603 is 30643735202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20253734603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20253734653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64502183 + ... + 64502496.

It is an arithmetic number, because the mean of its divisors is an integer number (5095684860).

Almost surely, 2^20253734603 is an apocalyptic number.

20253734603 is a deficient number, since it is larger than the sum of its proper divisors (129004837).

20253734603 is a wasteful number, since it uses less digits than its factorization.

20253734603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129004836.

The product of its (nonzero) digits is 90720, while the sum is 35.

The spelling of 20253734603 in words is "twenty billion, two hundred fifty-three million, seven hundred thirty-four thousand, six hundred three".