20363968653 has 40 divisors (see below), whose sum is σ = 33538860288. Its totient is φ = 10951984512.

The previous prime is 20363968609. The next prime is 20363968661. The reversal of 20363968653 is 35686936302.

It is not a de Polignac number, because 20363968653 - 2¹⁴ = 20363952269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 20363968596 and 20363968605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20363964653) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39300 + ... + 205602.

Almost surely, 2^20363968653 is an apocalyptic number.

It is an amenable number.

20363968653 is a deficient number, since it is larger than the sum of its proper divisors (13174891635).

20363968653 is an equidigital number, since it uses as much as digits as its factorization.

20363968653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166351 (or 166330 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 51.

The spelling of 20363968653 in words is "twenty billion, three hundred sixty-three million, nine hundred sixty-eight thousand, six hundred fifty-three".