20145254 has 4 divisors (see below), whose sum is σ = 30217884. Its totient is φ = 10072626.

The previous prime is 20145241. The next prime is 20145269. The reversal of 20145254 is 45254102.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036312 + ... + 5036315.

It is an arithmetic number, because the mean of its divisors is an integer number (7554471).

Almost surely, 2^20145254 is an apocalyptic number.

20145254 is a deficient number, since it is larger than the sum of its proper divisors (10072630).

20145254 is a wasteful number, since it uses less digits than its factorization.

20145254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072629.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20145254 is about 4488.3464661276. The cubic root of 20145254 is about 272.0973105541.

Adding to 20145254 its reverse (45254102), we get a palindrome (65399356).

The spelling of 20145254 in words is "twenty million, one hundred forty-five thousand, two hundred fifty-four".