20665567060 has 48 divisors (see below), whose sum is σ = 43954146432. Its totient is φ = 8160912000.

The previous prime is 20665567031. The next prime is 20665567063. The reversal of 20665567060 is 6076556602.

It is a super-2 number, since 2×20665567060² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20665566998 and 20665567016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20665567063) 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, 471270 + ... + 513250.

It is an arithmetic number, because the mean of its divisors is an integer number (915711384).

Almost surely, 2^20665567060 is an apocalyptic number.

20665567060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20665567060 is an abundant number, since it is smaller than the sum of its proper divisors (23288579372).

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

20665567060 is a wasteful number, since it uses less digits than its factorization.

20665567060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42304 (or 42302 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 20665567060 in words is "twenty billion, six hundred sixty-five million, five hundred sixty-seven thousand, sixty".