20250554 has 4 divisors (see below), whose sum is σ = 30375834. Its totient is φ = 10125276.

The previous prime is 20250541. The next prime is 20250563. The reversal of 20250554 is 45505202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45505202 = 2 ⋅22752601.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 207025 = 4477^2 + 455^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5062637 + ... + 5062640.

Almost surely, 2^20250554 is an apocalyptic number.

20250554 is a deficient number, since it is larger than the sum of its proper divisors (10125280).

20250554 is a wasteful number, since it uses less digits than its factorization.

20250554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125279.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20250554 is about 4500.0615551346. The cubic root of 20250554 is about 272.5705745437.

Adding to 20250554 its reverse (45505202), we get a palindrome (65755756).

The spelling of 20250554 in words is "twenty million, two hundred fifty thousand, five hundred fifty-four".