20022657 has 4 divisors (see below), whose sum is σ = 26696880. Its totient is φ = 13348436.

The previous prime is 20022631. The next prime is 20022677. The reversal of 20022657 is 75622002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20022657 - 2⁶ = 20022593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20022677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3337107 + ... + 3337112.

It is an arithmetic number, because the mean of its divisors is an integer number (6674220).

Almost surely, 2^20022657 is an apocalyptic number.

It is an amenable number.

20022657 is a deficient number, since it is larger than the sum of its proper divisors (6674223).

20022657 is an equidigital number, since it uses as much as digits as its factorization.

20022657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674222.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20022657 is about 4474.6683676000. The cubic root of 20022657 is about 271.5442239110.

Adding to 20022657 its reverse (75622002), we get a palindrome (95644659).

The spelling of 20022657 in words is "twenty million, twenty-two thousand, six hundred fifty-seven".