20663655452 has 36 divisors (see below), whose sum is σ = 39795043848. Its totient is φ = 9381372000.

The previous prime is 20663655451. The next prime is 20663655497. The reversal of 20663655452 is 25455636602.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20663655451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387827 + ... + 437877.

Almost surely, 2^20663655452 is an apocalyptic number.

20663655452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20663655452 is a deficient number, since it is larger than the sum of its proper divisors (19131388396).

20663655452 is a wasteful number, since it uses less digits than its factorization.

20663655452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50930 (or 50917 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 44.

The spelling of 20663655452 in words is "twenty billion, six hundred sixty-three million, six hundred fifty-five thousand, four hundred fifty-two".