20260551 has 4 divisors (see below), whose sum is σ = 27014072. Its totient is φ = 13507032.

The previous prime is 20260547. The next prime is 20260553. The reversal of 20260551 is 15506202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20260551 - 2² = 20260547 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 (20260553) 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 3 ways as a sum of consecutive naturals, for example, 3376756 + ... + 3376761.

It is an arithmetic number, because the mean of its divisors is an integer number (6753518).

Almost surely, 2^20260551 is an apocalyptic number.

20260551 is a deficient number, since it is larger than the sum of its proper divisors (6753521).

20260551 is an equidigital number, since it uses as much as digits as its factorization.

20260551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753520.

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

The square root of 20260551 is about 4501.1721806658. The cubic root of 20260551 is about 272.6154200618.

Adding to 20260551 its reverse (15506202), we get a palindrome (35766753).

The spelling of 20260551 in words is "twenty million, two hundred sixty thousand, five hundred fifty-one".