20453444309 has 8 divisors (see below), whose sum is σ = 20688166080. Its totient is φ = 20218831776.

The previous prime is 20453444293. The next prime is 20453444329. The reversal of 20453444309 is 90344435402.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20453444309 - 2⁴ = 20453444293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453444329) 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, 384704 + ... + 434630.

It is an arithmetic number, because the mean of its divisors is an integer number (2586020760).

Almost surely, 2^20453444309 is an apocalyptic number.

It is an amenable number.

20453444309 is a deficient number, since it is larger than the sum of its proper divisors (234721771).

20453444309 is an equidigital number, since it uses as much as digits as its factorization.

20453444309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54619.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 20453444309 in words is "twenty billion, four hundred fifty-three million, four hundred forty-four thousand, three hundred nine".