20957343940827 has 96 divisors (see below), whose sum is σ = 35533741920768. Its totient is φ = 11655775231488.

The previous prime is 20957343940727. The next prime is 20957343940837. The reversal of 20957343940827 is 72804934375902.

20957343940827 is a `hidden beast` number, since 2 + 0 + 9 + 573 + 4 + 39 + 4 + 0 + 8 + 27 = 666.

It is not a de Polignac number, because 20957343940827 - 2⁷ = 20957343940699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (20957343940837) 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 95 ways as a sum of consecutive naturals, for example, 334734508 + ... + 334797110.

It is an arithmetic number, because the mean of its divisors is an integer number (370143145008).

Almost surely, 2^{20957343940827} is an apocalyptic number.

20957343940827 is a deficient number, since it is larger than the sum of its proper divisors (14576397979941).

20957343940827 is a wasteful number, since it uses less digits than its factorization.

20957343940827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63649 (or 63646 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 63.

The spelling of 20957343940827 in words is "twenty trillion, nine hundred fifty-seven billion, three hundred forty-three million, nine hundred forty thousand, eight hundred twenty-seven".