20759774568 has 64 divisors (see below), whose sum is σ = 55906536000. Its totient is φ = 6385927680.

The previous prime is 20759774551. The next prime is 20759774569. The reversal of 20759774568 is 86547795702.

It is a super-2 number, since 2×20759774568² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20759774569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693983 + ... + 1706193.

It is an arithmetic number, because the mean of its divisors is an integer number (873539625).

Almost surely, 2^20759774568 is an apocalyptic number.

It is an amenable number.

20759774568 is an abundant number, since it is smaller than the sum of its proper divisors (35146761432).

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

20759774568 is a wasteful number, since it uses less digits than its factorization.

20759774568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17682 (or 17678 counting only the distinct ones).

The product of its (nonzero) digits is 29635200, while the sum is 60.

The spelling of 20759774568 in words is "twenty billion, seven hundred fifty-nine million, seven hundred seventy-four thousand, five hundred sixty-eight".