20663732353 has 8 divisors (see below), whose sum is σ = 22566220416. Its totient is φ = 18765238800.

The previous prime is 20663732347. The next prime is 20663732387. The reversal of 20663732353 is 35323736602.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-20663732353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20663732333) 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, 987801 + ... + 1008502.

It is an arithmetic number, because the mean of its divisors is an integer number (2820777552).

Almost surely, 2^20663732353 is an apocalyptic number.

It is an amenable number.

20663732353 is a deficient number, since it is larger than the sum of its proper divisors (1902488063).

20663732353 is a wasteful number, since it uses less digits than its factorization.

20663732353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997255.

The product of its (nonzero) digits is 408240, while the sum is 40.

The spelling of 20663732353 in words is "twenty billion, six hundred sixty-three million, seven hundred thirty-two thousand, three hundred fifty-three".