20222757 has 32 divisors (see below), whose sum is σ = 31810560. Its totient is φ = 12674880.

The previous prime is 20222747. The next prime is 20222759. The reversal of 20222757 is 75722202.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20222757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20222757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30643 + ... + 31295.

It is an arithmetic number, because the mean of its divisors is an integer number (994080).

Almost surely, 2^20222757 is an apocalyptic number.

20222757 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20222757 is a deficient number, since it is larger than the sum of its proper divisors (11587803).

20222757 is a wasteful number, since it uses less digits than its factorization.

20222757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20222757 is about 4496.9719812336. The cubic root of 20222757 is about 272.4458024245.

Adding to 20222757 its reverse (75722202), we get a palindrome (95944959).

The spelling of 20222757 in words is "twenty million, two hundred twenty-two thousand, seven hundred fifty-seven".