20015450 has 96 divisors (see below), whose sum is σ = 47246976. Its totient is φ = 6140160.

The previous prime is 20015449. The next prime is 20015461. The reversal of 20015450 is 5451002.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241109 + ... + 241191.

It is an arithmetic number, because the mean of its divisors is an integer number (492156).

Almost surely, 2^20015450 is an apocalyptic number.

20015450 is an abundant number, since it is smaller than the sum of its proper divisors (27231526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20015450 is a wasteful number, since it uses less digits than its factorization.

20015450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20015450 is about 4473.8629840441. The cubic root of 20015450 is about 271.5116399226.

Adding to 20015450 its reverse (5451002), we get a palindrome (25466452).

The spelling of 20015450 in words is "twenty million, fifteen thousand, four hundred fifty".