20949229719 has 32 divisors (see below), whose sum is σ = 33865478400. Its totient is φ = 12693451680.

The previous prime is 20949229709. The next prime is 20949229747. The reversal of 20949229719 is 91792294902.

It is not a de Polignac number, because 20949229719 - 2¹¹ = 20949227671 is a prime.

It is a super-2 number, since 2×20949229719² (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 (20949229709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2173092 + ... + 2182710.

It is an arithmetic number, because the mean of its divisors is an integer number (1058296200).

Almost surely, 2^20949229719 is an apocalyptic number.

20949229719 is a deficient number, since it is larger than the sum of its proper divisors (12916248681).

20949229719 is a wasteful number, since it uses less digits than its factorization.

20949229719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16972 (or 16966 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 20949229719 in words is "twenty billion, nine hundred forty-nine million, two hundred twenty-nine thousand, seven hundred nineteen".