20493874949775 has 12 divisors (see below), whose sum is σ = 33883206583752. Its totient is φ = 10930066639840.

The previous prime is 20493874949767. The next prime is 20493874949777. The reversal of 20493874949775 is 57794947839402.

It is not a de Polignac number, because 20493874949775 - 2³ = 20493874949767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20493874949775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493874949777) 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 11 ways as a sum of consecutive naturals, for example, 136625832924 + ... + 136625833073.

It is an arithmetic number, because the mean of its divisors is an integer number (2823600548646).

Almost surely, 2^{20493874949775} is an apocalyptic number.

20493874949775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20493874949775 is a deficient number, since it is larger than the sum of its proper divisors (13389331633977).

20493874949775 is a wasteful number, since it uses less digits than its factorization.

20493874949775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273251666010 (or 273251666005 counting only the distinct ones).

The product of its (nonzero) digits is 3840721920, while the sum is 78.

The spelling of 20493874949775 in words is "twenty trillion, four hundred ninety-three billion, eight hundred seventy-four million, nine hundred forty-nine thousand, seven hundred seventy-five".