20220554 has 4 divisors (see below), whose sum is σ = 30330834. Its totient is φ = 10110276.

The previous prime is 20220517. The next prime is 20220581. The reversal of 20220554 is 45502202.

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., 12794929 + 7425625 = 3577^2 + 2725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055137 + ... + 5055140.

Almost surely, 2^20220554 is an apocalyptic number.

20220554 is a deficient number, since it is larger than the sum of its proper divisors (10110280).

20220554 is a wasteful number, since it uses less digits than its factorization.

20220554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110279.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20220554 is about 4496.7270319645. The cubic root of 20220554 is about 272.4359089515.

Adding to 20220554 its reverse (45502202), we get a palindrome (65722756).

The spelling of 20220554 in words is "twenty million, two hundred twenty thousand, five hundred fifty-four".