20211749086 has 16 divisors (see below), whose sum is σ = 31309171200. Its totient is φ = 9775641240.

The previous prime is 20211749083. The next prime is 20211749087. The reversal of 20211749086 is 68094711202.

It is a super-2 number, since 2×20211749086² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211749083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76065 + ... + 214963.

It is an arithmetic number, because the mean of its divisors is an integer number (1956823200).

Almost surely, 2^20211749086 is an apocalyptic number.

20211749086 is a deficient number, since it is larger than the sum of its proper divisors (11097422114).

20211749086 is a wasteful number, since it uses less digits than its factorization.

20211749086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141279.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 20211749086 in words is "twenty billion, two hundred eleven million, seven hundred forty-nine thousand, eighty-six".