20900207245 has 8 divisors (see below), whose sum is σ = 25328568600. Its totient is φ = 16554619200.

The previous prime is 20900207239. The next prime is 20900207333. The reversal of 20900207245 is 54270200902.

It can be written as a sum of positive squares in 4 ways, for example, as 1149277801 + 19750929444 = 33901^2 + 140538^2 .

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

It is not a de Polignac number, because 20900207245 - 2¹⁷ = 20900076173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20692770 + ... + 20693779.

It is an arithmetic number, because the mean of its divisors is an integer number (3166071075).

Almost surely, 2^20900207245 is an apocalyptic number.

It is an amenable number.

20900207245 is a deficient number, since it is larger than the sum of its proper divisors (4428361355).

20900207245 is a wasteful number, since it uses less digits than its factorization.

20900207245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41386655.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 20900207245 in words is "twenty billion, nine hundred million, two hundred seven thousand, two hundred forty-five".