20687643758332 has 12 divisors (see below), whose sum is σ = 36973661185440. Its totient is φ = 10123740562496.

The previous prime is 20687643758329. The next prime is 20687643758351. The reversal of 20687643758332 is 23385734678602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55020328957 + ... + 55020329332.

It is an arithmetic number, because the mean of its divisors is an integer number (3081138432120).

Almost surely, 2^{20687643758332} is an apocalyptic number.

It is an amenable number.

20687643758332 is a deficient number, since it is larger than the sum of its proper divisors (16286017427108).

20687643758332 is a wasteful number, since it uses less digits than its factorization.

20687643758332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110040658340 (or 110040658338 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 64.

The spelling of 20687643758332 in words is "twenty trillion, six hundred eighty-seven billion, six hundred forty-three million, seven hundred fifty-eight thousand, three hundred thirty-two".