20249877186 has 192 divisors, whose sum is σ = 56380686336. Its totient is φ = 5099241600.

The previous prime is 20249877169. The next prime is 20249877227. The reversal of 20249877186 is 68177894202.

It is a happy number.

20249877186 is a `hidden beast` number, since 2 + 0 + 2 + 498 + 7 + 71 + 86 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19640491 + ... + 19641521.

It is an arithmetic number, because the mean of its divisors is an integer number (293649408).

Almost surely, 2^20249877186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20249877186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28190343168).

20249877186 is an abundant number, since it is smaller than the sum of its proper divisors (36130809150).

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

20249877186 is a wasteful number, since it uses less digits than its factorization.

20249877186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 20249877186 in words is "twenty billion, two hundred forty-nine million, eight hundred seventy-seven thousand, one hundred eighty-six".