20687651252000 has 48 divisors (see below), whose sum is σ = 50829559135992. Its totient is φ = 8275060499200.

The previous prime is 20687651251961. The next prime is 20687651252027. The reversal of 20687651252000 is 25215678602.

It can be written as a sum of positive squares in 4 ways, for example, as 4801655447824 + 15885995804176 = 2191268^2 + 3985724^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585952407 + ... + 2585960406.

Almost surely, 2^{20687651252000} is an apocalyptic number.

20687651252000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20687651252000 is an abundant number, since it is smaller than the sum of its proper divisors (30141907883992).

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

20687651252000 is an equidigital number, since it uses as much as digits as its factorization.

20687651252000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171912838 (or 5171912820 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 20687651252000 in words is "twenty trillion, six hundred eighty-seven billion, six hundred fifty-one million, two hundred fifty-two thousand".