20043554 has 4 divisors (see below), whose sum is σ = 30065334. Its totient is φ = 10021776.

The previous prime is 20043469. The next prime is 20043559. The reversal of 20043554 is 45534002.

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., 20043529 + 25 = 4477^2 + 5^2 .

It is not an unprimeable number, because it can be changed into a prime (20043559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010887 + ... + 5010890.

Almost surely, 2^20043554 is an apocalyptic number.

20043554 is a deficient number, since it is larger than the sum of its proper divisors (10021780).

20043554 is a wasteful number, since it uses less digits than its factorization.

20043554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021779.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20043554 is about 4477.0027920474. The cubic root of 20043554 is about 271.6386583760.

Adding to 20043554 its reverse (45534002), we get a palindrome (65577556).

The spelling of 20043554 in words is "twenty million, forty-three thousand, five hundred fifty-four".