20727851004 has 36 divisors (see below), whose sum is σ = 59880459184. Its totient is φ = 5922243072.

The previous prime is 20727851003. The next prime is 20727851009. The reversal of 20727851004 is 40015872702.

20727851004 is a `hidden beast` number, since 2 + 0 + 72 + 78 + 510 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 20727851004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727851003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41126437 + ... + 41126940.

Almost surely, 2^20727851004 is an apocalyptic number.

It is an amenable number.

20727851004 is an abundant number, since it is smaller than the sum of its proper divisors (39152608180).

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

20727851004 is a wasteful number, since it uses less digits than its factorization.

20727851004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82253394 (or 82253389 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The spelling of 20727851004 in words is "twenty billion, seven hundred twenty-seven million, eight hundred fifty-one thousand, four".