20226624 has 112 divisors (see below), whose sum is σ = 59716416. Its totient is φ = 5990400.

The previous prime is 20226623. The next prime is 20226629. The reversal of 20226624 is 42662202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20226594 and 20226603.

It is not an unprimeable number, because it can be changed into a prime (20226623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128754 + ... + 128910.

Almost surely, 2^20226624 is an apocalyptic number.

20226624 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20226624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29858208).

20226624 is an abundant number, since it is smaller than the sum of its proper divisors (39489792).

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

20226624 is a wasteful number, since it uses less digits than its factorization.

20226624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20226624 is about 4497.4019166626. The cubic root of 20226624 is about 272.4631670330.

Adding to 20226624 its reverse (42662202), we get a palindrome (62888826).

It can be divided in two parts, 2022 and 6624, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 20226624 in words is "twenty million, two hundred twenty-six thousand, six hundred twenty-four".