20027756 has 48 divisors (see below), whose sum is σ = 42287616. Its totient is φ = 8114304.

The previous prime is 20027741. The next prime is 20027783. The reversal of 20027756 is 65772002.

It is a happy number.

It is a super-2 number, since 2×20027756² = 802222020791072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88115 + ... + 88341.

It is an arithmetic number, because the mean of its divisors is an integer number (880992).

Almost surely, 2^20027756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20027756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21143808).

20027756 is an abundant number, since it is smaller than the sum of its proper divisors (22259860).

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

20027756 is a wasteful number, since it uses less digits than its factorization.

20027756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 20027756 is about 4475.2380942247. The cubic root of 20027756 is about 271.5672725750.

Adding to 20027756 its reverse (65772002), we get a palindrome (85799758).

The spelling of 20027756 in words is "twenty million, twenty-seven thousand, seven hundred fifty-six".