20223512 has 8 divisors (see below), whose sum is σ = 37919100. Its totient is φ = 10111752.

The previous prime is 20223499. The next prime is 20223517. The reversal of 20223512 is 21532202.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20223512² = 817980875228288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20223517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263962 + ... + 1263977.

Almost surely, 2^20223512 is an apocalyptic number.

It is an amenable number.

20223512 is a deficient number, since it is larger than the sum of its proper divisors (17695588).

20223512 is a wasteful number, since it uses less digits than its factorization.

20223512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527945 (or 2527941 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20223512 is about 4497.0559258253. The cubic root of 20223512 is about 272.4491928956.

Adding to 20223512 its reverse (21532202), we get a palindrome (41755714).

The spelling of 20223512 in words is "twenty million, two hundred twenty-three thousand, five hundred twelve".