20687532968 has 32 divisors (see below), whose sum is σ = 41766969600. Its totient is φ = 9570300672.

The previous prime is 20687532967. The next prime is 20687532979. The reversal of 20687532968 is 86923578602.

It is not an unprimeable number, because it can be changed into a prime (20687532967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281080 + ... + 1297127.

It is an arithmetic number, because the mean of its divisors is an integer number (1305217800).

Almost surely, 2^20687532968 is an apocalyptic number.

It is an amenable number.

20687532968 is an abundant number, since it is smaller than the sum of its proper divisors (21079436632).

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

20687532968 is a wasteful number, since it uses less digits than its factorization.

20687532968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578289 (or 2578285 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 20687532968 in words is "twenty billion, six hundred eighty-seven million, five hundred thirty-two thousand, nine hundred sixty-eight".