20450253 has 8 divisors (see below), whose sum is σ = 27517600. Its totient is φ = 13508208.

The previous prime is 20450239. The next prime is 20450263. The reversal of 20450253 is 35205402.

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

It is not a de Polignac number, because 20450253 - 2¹² = 20446157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450263) 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, 30943 + ... + 31596.

It is an arithmetic number, because the mean of its divisors is an integer number (3439700).

Almost surely, 2^20450253 is an apocalyptic number.

It is an amenable number.

20450253 is a deficient number, since it is larger than the sum of its proper divisors (7067347).

20450253 is a wasteful number, since it uses less digits than its factorization.

20450253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62651.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20450253 is about 4522.1955950622. The cubic root of 20450253 is about 273.4636220356.

Adding to 20450253 its reverse (35205402), we get a palindrome (55655655).

The spelling of 20450253 in words is "twenty million, four hundred fifty thousand, two hundred fifty-three".