20719682361 has 32 divisors (see below), whose sum is σ = 35402822400. Its totient is φ = 11731184640.

The previous prime is 20719682351. The next prime is 20719682383. The reversal of 20719682361 is 16328691702.

20719682361 is a `hidden beast` number, since 20 + 7 + 196 + 82 + 361 = 666.

It is not a de Polignac number, because 20719682361 - 2¹¹ = 20719680313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20719682351) 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 31 ways as a sum of consecutive naturals, for example, 482280 + ... + 523481.

It is an arithmetic number, because the mean of its divisors is an integer number (1106338200).

Almost surely, 2^20719682361 is an apocalyptic number.

20719682361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20719682361 is a deficient number, since it is larger than the sum of its proper divisors (14683140039).

20719682361 is a wasteful number, since it uses less digits than its factorization.

20719682361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005886 (or 1005880 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20719682361 in words is "twenty billion, seven hundred nineteen million, six hundred eighty-two thousand, three hundred sixty-one".