20007774 has 12 divisors (see below), whose sum is σ = 43350216. Its totient is φ = 6669252.

The previous prime is 20007773. The next prime is 20007781. The reversal of 20007774 is 47770002.

It is a happy number.

It is a super-2 number, since 2×20007774² = 800622040870152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20007773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555754 + ... + 555789.

It is an arithmetic number, because the mean of its divisors is an integer number (3612518).

Almost surely, 2^20007774 is an apocalyptic number.

20007774 is an abundant number, since it is smaller than the sum of its proper divisors (23342442).

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

20007774 is a wasteful number, since it uses less digits than its factorization.

20007774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111551 (or 1111548 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 20007774 is about 4473.0050301783. The cubic root of 20007774 is about 271.4769269079.

Adding to 20007774 its reverse (47770002), we get a palindrome (67777776).

The spelling of 20007774 in words is "twenty million, seven thousand, seven hundred seventy-four".