20649263203 has 4 divisors (see below), whose sum is σ = 20940097968. Its totient is φ = 20358428440.

The previous prime is 20649263183. The next prime is 20649263207. The reversal of 20649263203 is 30236294602.

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

It is a cyclic number.

It is not a de Polignac number, because 20649263203 - 2²¹ = 20647166051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20649263207) 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, 145417276 + ... + 145417417.

It is an arithmetic number, because the mean of its divisors is an integer number (5235024492).

Almost surely, 2^20649263203 is an apocalyptic number.

20649263203 is a deficient number, since it is larger than the sum of its proper divisors (290834765).

20649263203 is an equidigital number, since it uses as much as digits as its factorization.

20649263203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290834764.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 20649263203 in words is "twenty billion, six hundred forty-nine million, two hundred sixty-three thousand, two hundred three".