22012620 has 96 divisors (see below), whose sum is σ = 74608128. Its totient is φ = 4733952.

The previous prime is 22012607. The next prime is 22012631. The reversal of 22012620 is 2621022.

22012620 = T₁₁₀₄ + T₁₁₀₅ + ... + T₁₁₃₈.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22012620.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5599 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (777168).

Almost surely, 2^22012620 is an apocalyptic number.

22012620 is a gapful number since it is divisible by the number (20) 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 22012620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37304064).

22012620 is an abundant number, since it is smaller than the sum of its proper divisors (52595508).

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

22012620 is a wasteful number, since it uses less digits than its factorization.

22012620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119 (or 3117 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22012620 is about 4691.7608634712. The cubic root of 22012620 is about 280.2575012124.

Adding to 22012620 its reverse (2621022), we get a palindrome (24633642).

The spelling of 22012620 in words is "twenty-two million, twelve thousand, six hundred twenty".