20026551 has 8 divisors (see below), whose sum is σ = 28107520. Its totient is φ = 12648312.

The previous prime is 20026543. The next prime is 20026553. The reversal of 20026551 is 15562002.

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

It is not a de Polignac number, because 20026551 - 2³ = 20026543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20026553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175615 + ... + 175728.

It is an arithmetic number, because the mean of its divisors is an integer number (3513440).

Almost surely, 2^20026551 is an apocalyptic number.

20026551 is a deficient number, since it is larger than the sum of its proper divisors (8080969).

20026551 is a wasteful number, since it uses less digits than its factorization.

20026551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351365.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20026551 is about 4475.1034624911. The cubic root of 20026551 is about 271.5618260482.

Adding to 20026551 its reverse (15562002), we get a palindrome (35588553).

The spelling of 20026551 in words is "twenty million, twenty-six thousand, five hundred fifty-one".