20126616 has 16 divisors (see below), whose sum is σ = 50316600. Its totient is φ = 6708864.

The previous prime is 20126597. The next prime is 20126663. The reversal of 20126616 is 61662102.

It is a super-2 number, since 2×20126616² = 810161343222912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 838609 = 20126616 / (2 + 0 + 1 + 2 + 6 + 6 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419281 + ... + 419328.

Almost surely, 2^20126616 is an apocalyptic number.

It is an amenable number.

20126616 is an abundant number, since it is smaller than the sum of its proper divisors (30189984).

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

20126616 is a wasteful number, since it uses less digits than its factorization.

20126616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838618 (or 838614 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20126616 is about 4486.2697199344. The cubic root of 20126616 is about 272.0133716033.

Adding to 20126616 its reverse (61662102), we get a palindrome (81788718).

The spelling of 20126616 in words is "twenty million, one hundred twenty-six thousand, six hundred sixteen".