20746308385 has 16 divisors (see below), whose sum is σ = 27186503040. Its totient is φ = 15072835840.

The previous prime is 20746308367. The next prime is 20746308403. The reversal of 20746308385 is 58380364702.

It is an interprime number because it is at equal distance from previous prime (20746308367) and next prime (20746308403).

It is not a de Polignac number, because 20746308385 - 2⁵ = 20746308353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137800 + ... + 245929.

It is an arithmetic number, because the mean of its divisors is an integer number (1699156440).

Almost surely, 2^20746308385 is an apocalyptic number.

It is an amenable number.

20746308385 is a deficient number, since it is larger than the sum of its proper divisors (6440194655).

20746308385 is a wasteful number, since it uses less digits than its factorization.

20746308385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384728.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20746308385 in words is "twenty billion, seven hundred forty-six million, three hundred eight thousand, three hundred eighty-five".