20223021204 has 18 divisors (see below), whose sum is σ = 51119303690. Its totient is φ = 6741007056.

The previous prime is 20223021199. The next prime is 20223021227. The reversal of 20223021204 is 40212032202.

It can be written as a sum of positive squares in only one way, i.e., 20042064900 + 180956304 = 141570^2 + 13452^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280875259 + ... + 280875330.

Almost surely, 2^20223021204 is an apocalyptic number.

It is an amenable number.

20223021204 is an abundant number, since it is smaller than the sum of its proper divisors (30896282486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20223021204 is a wasteful number, since it uses less digits than its factorization.

20223021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561750599 (or 561750594 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20223021204 its reverse (40212032202), we get a palindrome (60435053406).

The spelling of 20223021204 in words is "twenty billion, two hundred twenty-three million, twenty-one thousand, two hundred four".