20445256124 has 12 divisors (see below), whose sum is σ = 35780963400. Its totient is φ = 10222123728.

The previous prime is 20445256123. The next prime is 20445256127. The reversal of 20445256124 is 42165254402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445256123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26054 + ... + 203885.

It is an arithmetic number, because the mean of its divisors is an integer number (2981746950).

Almost surely, 2^20445256124 is an apocalyptic number.

It is an amenable number.

20445256124 is a deficient number, since it is larger than the sum of its proper divisors (15335707276).

20445256124 is a wasteful number, since it uses less digits than its factorization.

20445256124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252172 (or 252170 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 20445256124 in words is "twenty billion, four hundred forty-five million, two hundred fifty-six thousand, one hundred twenty-four".