20247437250645 has 32 divisors (see below), whose sum is σ = 35341237370880. Its totient is φ = 9816868165440.

The previous prime is 20247437250643. The next prime is 20247437250647. The reversal of 20247437250645 is 54605273474202.

It is an interprime number because it is at equal distance from previous prime (20247437250643) and next prime (20247437250647).

It is not a de Polignac number, because 20247437250645 - 2¹ = 20247437250643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247437250643) 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 in 31 ways as a sum of consecutive naturals, for example, 27843996 + ... + 28561914.

It is an arithmetic number, because the mean of its divisors is an integer number (1104413667840).

Almost surely, 2^{20247437250645} is an apocalyptic number.

It is an amenable number.

20247437250645 is a deficient number, since it is larger than the sum of its proper divisors (15093800120235).

20247437250645 is a wasteful number, since it uses less digits than its factorization.

20247437250645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888865.

The product of its (nonzero) digits is 11289600, while the sum is 51.

The spelling of 20247437250645 in words is "twenty trillion, two hundred forty-seven billion, four hundred thirty-seven million, two hundred fifty thousand, six hundred forty-five".