20734237270745 has 4 divisors (see below), whose sum is σ = 24881084724900. Its totient is φ = 16587389816592.

The previous prime is 20734237270729. The next prime is 20734237270753. The reversal of 20734237270745 is 54707273243702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7282852152976 + 13451385117769 = 2698676^2 + 3667613^2 .

It is a cyclic number.

It is not a de Polignac number, because 20734237270745 - 2⁴ = 20734237270729 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 2073423727070 + ... + 2073423727079.

It is an arithmetic number, because the mean of its divisors is an integer number (6220271181225).

Almost surely, 2^{20734237270745} is an apocalyptic number.

It is an amenable number.

20734237270745 is a deficient number, since it is larger than the sum of its proper divisors (4146847454155).

20734237270745 is an equidigital number, since it uses as much as digits as its factorization.

20734237270745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146847454154.

The product of its (nonzero) digits is 13829760, while the sum is 53.

The spelling of 20734237270745 in words is "twenty trillion, seven hundred thirty-four billion, two hundred thirty-seven million, two hundred seventy thousand, seven hundred forty-five".