20050551 has 16 divisors (see below), whose sum is σ = 29790720. Its totient is φ = 13328280.

The previous prime is 20050523. The next prime is 20050561. The reversal of 20050551 is 15505002.

20050551 = T₆₃ + T₆₄ + ... + T₄₉₃.

It is not a de Polignac number, because 20050551 - 2⁹ = 20050039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050561) 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, 10776 + ... + 12498.

It is an arithmetic number, because the mean of its divisors is an integer number (1861920).

Almost surely, 2^20050551 is an apocalyptic number.

20050551 is a deficient number, since it is larger than the sum of its proper divisors (9740169).

20050551 is a wasteful number, since it uses less digits than its factorization.

20050551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2157 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 20050551 is about 4477.7841618372. The cubic root of 20050551 is about 271.6702634591.

Adding to 20050551 its reverse (15505002), we get a palindrome (35555553).

It can be divided in two parts, 2005055 and 1, that added together give a square (2005056 = 1416²).

The spelling of 20050551 in words is "twenty million, fifty thousand, five hundred fifty-one".