20446414551 has 10 divisors (see below), whose sum is σ = 30543409512. Its totient is φ = 13630942980.

The previous prime is 20446414543. The next prime is 20446414601. The reversal of 20446414551 is 15541464402.

20446414551 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 641 + 4 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 20446414551 - 2³ = 20446414543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20446414511) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 126212355 + ... + 126212516.

Almost surely, 2^20446414551 is an apocalyptic number.

20446414551 is a deficient number, since it is larger than the sum of its proper divisors (10096994961).

20446414551 is an equidigital number, since it uses as much as digits as its factorization.

20446414551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252424883 (or 252424874 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 20446414551 its reverse (15541464402), we get a palindrome (35987878953).

The spelling of 20446414551 in words is "twenty billion, four hundred forty-six million, four hundred fourteen thousand, five hundred fifty-one".