20230556 has 6 divisors (see below), whose sum is σ = 35403480. Its totient is φ = 10115276.

The previous prime is 20230543. The next prime is 20230571. The reversal of 20230556 is 65503202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2528816 + ... + 2528823.

It is an arithmetic number, because the mean of its divisors is an integer number (5900580).

Almost surely, 2^20230556 is an apocalyptic number.

It is an amenable number.

20230556 is a deficient number, since it is larger than the sum of its proper divisors (15172924).

20230556 is a wasteful number, since it uses less digits than its factorization.

20230556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5057643 (or 5057641 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20230556 is about 4497.8390366931. The cubic root of 20230556 is about 272.4808212521.

Adding to 20230556 its reverse (65503202), we get a palindrome (85733758).

The spelling of 20230556 in words is "twenty million, two hundred thirty thousand, five hundred fifty-six".