20864382346 has 4 divisors (see below), whose sum is σ = 31296573522. Its totient is φ = 10432191172.

The previous prime is 20864382337. The next prime is 20864382349. The reversal of 20864382346 is 64328346802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64328346802 = 2 ⋅32164173401.

It can be written as a sum of positive squares in only one way, i.e., 16272829225 + 4591553121 = 127565^2 + 67761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20864382296 and 20864382305.

It is not an unprimeable number, because it can be changed into a prime (20864382349) 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 as a sum of consecutive naturals, namely, 5216095585 + ... + 5216095588.

Almost surely, 2^20864382346 is an apocalyptic number.

20864382346 is a deficient number, since it is larger than the sum of its proper divisors (10432191176).

20864382346 is a wasteful number, since it uses less digits than its factorization.

20864382346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10432191175.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 20864382346 in words is "twenty billion, eight hundred sixty-four million, three hundred eighty-two thousand, three hundred forty-six".