20420769600 has 1008 divisors, whose sum is σ = 94574928960. Its totient is φ = 4238438400.

The previous prime is 20420769587. The next prime is 20420769619. The reversal of 20420769600 is 696702402.

It is a happy number.

20420769600 is a `hidden beast` number, since 2 + 0 + 42 + 0 + 7 + 6 + 9 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 23284362 + ... + 23285238.

Almost surely, 2^20420769600 is an apocalyptic number.

20420769600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20420769600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47287464480).

20420769600 is an abundant number, since it is smaller than the sum of its proper divisors (74154159360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20420769600 is a wasteful number, since it uses less digits than its factorization.

20420769600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20420769600 in words is "twenty billion, four hundred twenty million, seven hundred sixty-nine thousand, six hundred".