20860395688 has 16 divisors (see below), whose sum is σ = 42668991360. Its totient is φ = 9481998000.

The previous prime is 20860395643. The next prime is 20860395701. The reversal of 20860395688 is 88659306802.

It is a happy number.

It is a super-2 number, since 2×20860395688² (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, 118524888 + ... + 118525063.

It is an arithmetic number, because the mean of its divisors is an integer number (2666811960).

Almost surely, 2^20860395688 is an apocalyptic number.

It is an amenable number.

20860395688 is an abundant number, since it is smaller than the sum of its proper divisors (21808595672).

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

20860395688 is a wasteful number, since it uses less digits than its factorization.

20860395688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237049968 (or 237049964 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 20860395688 in words is "twenty billion, eight hundred sixty million, three hundred ninety-five thousand, six hundred eighty-eight".