20403231005745 has 96 divisors (see below), whose sum is σ = 42604093059840. Its totient is φ = 9236635752960.

The previous prime is 20403231005743. The next prime is 20403231005749. The reversal of 20403231005745 is 54750013230402.

20403231005745 is a `hidden beast` number, since 2 + 0 + 40 + 32 + 3 + 10 + 0 + 574 + 5 = 666.

It is not a de Polignac number, because 20403231005745 - 2¹ = 20403231005743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403231005743) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 14291416 + ... + 15654105.

It is an arithmetic number, because the mean of its divisors is an integer number (443792636040).

Almost surely, 2^{20403231005745} is an apocalyptic number.

It is an amenable number.

20403231005745 is an abundant number, since it is smaller than the sum of its proper divisors (22200862054095).

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

20403231005745 is a wasteful number, since it uses less digits than its factorization.

20403231005745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29945652 (or 29945639 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 20403231005745 in words is "twenty trillion, four hundred three billion, two hundred thirty-one million, five thousand, seven hundred forty-five".