20560251 has 8 divisors (see below), whose sum is σ = 27800064. Its totient is φ = 13513640.

The previous prime is 20560247. The next prime is 20560273. The reversal of 20560251 is 15206502.

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

It is a cyclic number.

It is not a de Polignac number, because 20560251 - 2² = 20560247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20560151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48051 + ... + 48476.

It is an arithmetic number, because the mean of its divisors is an integer number (3475008).

Almost surely, 2^20560251 is an apocalyptic number.

20560251 is a deficient number, since it is larger than the sum of its proper divisors (7239813).

20560251 is an equidigital number, since it uses as much as digits as its factorization.

20560251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96601.

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

The square root of 20560251 is about 4534.3412972559. The cubic root of 20560251 is about 273.9530484134.

Adding to 20560251 its reverse (15206502), we get a palindrome (35766753).

The spelling of 20560251 in words is "twenty million, five hundred sixty thousand, two hundred fifty-one".