20505445302 has 8 divisors (see below), whose sum is σ = 41010890616. Its totient is φ = 6835148432.

The previous prime is 20505445291. The next prime is 20505445313. The reversal of 20505445302 is 20354450502.

It is an interprime number because it is at equal distance from previous prime (20505445291) and next prime (20505445313).

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

20505445302 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20505445302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708787103 + ... + 1708787114.

It is an arithmetic number, because the mean of its divisors is an integer number (5126361327).

Almost surely, 2^20505445302 is an apocalyptic number.

20505445302 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20505445302 is a wasteful number, since it uses less digits than its factorization.

20505445302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3417574222.

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 20505445302 its reverse (20354450502), we get a palindrome (40859895804).

The spelling of 20505445302 in words is "twenty billion, five hundred five million, four hundred forty-five thousand, three hundred two".