20725517060 has 24 divisors (see below), whose sum is σ = 43660897560. Its totient is φ = 8264052224.

The previous prime is 20725517017. The next prime is 20725517063. The reversal of 20725517060 is 6071552702.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14853316 + 20710663744 = 3854^2 + 143912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20725517060.

It is not an unprimeable number, because it can be changed into a prime (20725517063) 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, 1628165 + ... + 1640844.

It is an arithmetic number, because the mean of its divisors is an integer number (1819204065).

Almost surely, 2^20725517060 is an apocalyptic number.

20725517060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20725517060 is an abundant number, since it is smaller than the sum of its proper divisors (22935380500).

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

20725517060 is a wasteful number, since it uses less digits than its factorization.

20725517060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3269335 (or 3269333 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The spelling of 20725517060 in words is "twenty billion, seven hundred twenty-five million, five hundred seventeen thousand, sixty".