20689754652 has 72 divisors (see below), whose sum is σ = 59846923136. Its totient is φ = 5903790624.

The previous prime is 20689754611. The next prime is 20689754653. The reversal of 20689754652 is 25645798602.

20689754652 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 97 + 546 + 5 + 2 = 666.

It is a super-3 number, since 3×20689754652³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20689754653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146163 + ... + 250485.

Almost surely, 2^20689754652 is an apocalyptic number.

It is an amenable number.

20689754652 is an abundant number, since it is smaller than the sum of its proper divisors (39157168484).

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

20689754652 is a wasteful number, since it uses less digits than its factorization.

20689754652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105127 (or 105122 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 20689754652 in words is "twenty billion, six hundred eighty-nine million, seven hundred fifty-four thousand, six hundred fifty-two".