20450256351 has 16 divisors (see below), whose sum is σ = 31887001344. Its totient is φ = 11414096064.

The previous prime is 20450256349. The next prime is 20450256361. The reversal of 20450256351 is 15365205402.

It is not a de Polignac number, because 20450256351 - 2¹ = 20450256349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450256341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11322606 + ... + 11324411.

It is an arithmetic number, because the mean of its divisors is an integer number (1992937584).

Almost surely, 2^20450256351 is an apocalyptic number.

20450256351 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20450256351 is a deficient number, since it is larger than the sum of its proper divisors (11436744993).

20450256351 is a wasteful number, since it uses less digits than its factorization.

20450256351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22647070.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 20450256351 in words is "twenty billion, four hundred fifty million, two hundred fifty-six thousand, three hundred fifty-one".