20550451305 has 32 divisors (see below), whose sum is σ = 33481244160. Its totient is φ = 10761603840.

The previous prime is 20550451303. The next prime is 20550451307. The reversal of 20550451305 is 50315405502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20550451303) and next prime (20550451307).

It is not a de Polignac number, because 20550451305 - 2¹ = 20550451303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20550451303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166579 + ... + 262391.

It is an arithmetic number, because the mean of its divisors is an integer number (1046288880).

Almost surely, 2^20550451305 is an apocalyptic number.

It is an amenable number.

20550451305 is a deficient number, since it is larger than the sum of its proper divisors (12930792855).

20550451305 is a wasteful number, since it uses less digits than its factorization.

20550451305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96081.

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 20550451305 its reverse (50315405502), we get a palindrome (70865856807).

The spelling of 20550451305 in words is "twenty billion, five hundred fifty million, four hundred fifty-one thousand, three hundred five".