20012554 has 4 divisors (see below), whose sum is σ = 30018834. Its totient is φ = 10006276.

The previous prime is 20012543. The next prime is 20012561. The reversal of 20012554 is 45521002.

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

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 1046529 = 4355^2 + 1023^2 .

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, 5003137 + ... + 5003140.

Almost surely, 2^20012554 is an apocalyptic number.

20012554 is a deficient number, since it is larger than the sum of its proper divisors (10006280).

20012554 is a wasteful number, since it uses less digits than its factorization.

20012554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006279.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20012554 is about 4473.5393146814. The cubic root of 20012554 is about 271.4985444449.

Adding to 20012554 its reverse (45521002), we get a palindrome (65533556).

The spelling of 20012554 in words is "twenty million, twelve thousand, five hundred fifty-four".