20602253 has 4 divisors (see below), whose sum is σ = 23545440. Its totient is φ = 17659068.

The previous prime is 20602243. The next prime is 20602261. The reversal of 20602253 is 35220602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20602253 - 2⁴ = 20602237 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 (20602223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1471583 + ... + 1471596.

It is an arithmetic number, because the mean of its divisors is an integer number (5886360).

Almost surely, 2^20602253 is an apocalyptic number.

It is an amenable number.

20602253 is a deficient number, since it is larger than the sum of its proper divisors (2943187).

20602253 is an equidigital number, since it uses as much as digits as its factorization.

20602253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943186.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20602253 is about 4538.9704779829. The cubic root of 20602253 is about 274.1394720344.

Adding to 20602253 its reverse (35220602), we get a palindrome (55822855).

The spelling of 20602253 in words is "twenty million, six hundred two thousand, two hundred fifty-three".