20025454 has 4 divisors (see below), whose sum is σ = 30038184. Its totient is φ = 10012726.

The previous prime is 20025443. The next prime is 20025461. The reversal of 20025454 is 45452002.

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

It is a super-2 number, since 2×20025454² = 802037615812232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5006362 + ... + 5006365.

It is an arithmetic number, because the mean of its divisors is an integer number (7509546).

Almost surely, 2^20025454 is an apocalyptic number.

20025454 is a deficient number, since it is larger than the sum of its proper divisors (10012730).

20025454 is a wasteful number, since it uses less digits than its factorization.

20025454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012729.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20025454 is about 4474.9808938140. The cubic root of 20025454 is about 271.5568674849.

Adding to 20025454 its reverse (45452002), we get a palindrome (65477456).

The spelling of 20025454 in words is "twenty million, twenty-five thousand, four hundred fifty-four".