20505922345 has 8 divisors (see below), whose sum is σ = 25179365376. Its totient is φ = 16023232176.

The previous prime is 20505922303. The next prime is 20505922363. The reversal of 20505922345 is 54322950502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20505922345 - 2²¹ = 20503825193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47687977 + ... + 47688406.

It is an arithmetic number, because the mean of its divisors is an integer number (3147420672).

Almost surely, 2^20505922345 is an apocalyptic number.

It is an amenable number.

20505922345 is a deficient number, since it is larger than the sum of its proper divisors (4673443031).

20505922345 is an equidigital number, since it uses as much as digits as its factorization.

20505922345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95376431.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20505922345 in words is "twenty billion, five hundred five million, nine hundred twenty-two thousand, three hundred forty-five".