20277285185 has 32 divisors (see below), whose sum is σ = 25712640000. Its totient is φ = 15320295936.

The previous prime is 20277285157. The next prime is 20277285187. The reversal of 20277285185 is 58158277202.

It is a cyclic number.

It is not a de Polignac number, because 20277285185 - 2¹⁶ = 20277219649 is a prime.

It is a super-2 number, since 2×20277285185² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20277285187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13089791 + ... + 13091339.

It is an arithmetic number, because the mean of its divisors is an integer number (803520000).

Almost surely, 2^20277285185 is an apocalyptic number.

It is an amenable number.

20277285185 is a deficient number, since it is larger than the sum of its proper divisors (5435354815).

20277285185 is a wasteful number, since it uses less digits than its factorization.

20277285185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 627200, while the sum is 47.

The spelling of 20277285185 in words is "twenty billion, two hundred seventy-seven million, two hundred eighty-five thousand, one hundred eighty-five".