20500450413 has 8 divisors (see below), whose sum is σ = 28522365888. Its totient is φ = 13072750944.

The previous prime is 20500450379. The next prime is 20500450427. The reversal of 20500450413 is 31405400502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20500450413 - 2¹⁷ = 20500319341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500450483) 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 7 ways as a sum of consecutive naturals, for example, 148553920 + ... + 148554057.

It is an arithmetic number, because the mean of its divisors is an integer number (3565295736).

Almost surely, 2^20500450413 is an apocalyptic number.

20500450413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20500450413 is a deficient number, since it is larger than the sum of its proper divisors (8021915475).

20500450413 is a wasteful number, since it uses less digits than its factorization.

20500450413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297108003.

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 20500450413 its reverse (31405400502), we get a palindrome (51905850915).

The spelling of 20500450413 in words is "twenty billion, five hundred million, four hundred fifty thousand, four hundred thirteen".