20223624 has 32 divisors (see below), whose sum is σ = 52758720. Its totient is φ = 6447936.

The previous prime is 20223617. The next prime is 20223629. The reversal of 20223624 is 42632202.

It is a super-3 number, since 3×20223624³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20223624.

It is not an unprimeable number, because it can be changed into a prime (20223629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17767 + ... + 18870.

It is an arithmetic number, because the mean of its divisors is an integer number (1648710).

Almost surely, 2^20223624 is an apocalyptic number.

20223624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20223624 is an abundant number, since it is smaller than the sum of its proper divisors (32535096).

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

20223624 is a wasteful number, since it uses less digits than its factorization.

20223624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36669 (or 36665 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 20223624 is about 4497.0683783994. The cubic root of 20223624 is about 272.4496958457.

Adding to 20223624 its reverse (42632202), we get a palindrome (62855826).

The spelling of 20223624 in words is "twenty million, two hundred twenty-three thousand, six hundred twenty-four".