20860725218 has 8 divisors (see below), whose sum is σ = 31324485612. Its totient is φ = 10419230016.

The previous prime is 20860725163. The next prime is 20860725229. The reversal of 20860725218 is 81252706802.

It can be written as a sum of positive squares in 2 ways, for example, as 13315544449 + 7545180769 = 115393^2 + 86863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20860725218² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5563955 + ... + 5567702.

Almost surely, 2^20860725218 is an apocalyptic number.

20860725218 is a deficient number, since it is larger than the sum of its proper divisors (10463760394).

20860725218 is a wasteful number, since it uses less digits than its factorization.

20860725218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11132596.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 20860725218 in words is "twenty billion, eight hundred sixty million, seven hundred twenty-five thousand, two hundred eighteen".