20221377 has 16 divisors (see below), whose sum is σ = 30961920. Its totient is φ = 11610000.

The previous prime is 20221343. The next prime is 20221379. The reversal of 20221377 is 77312202.

It is not a de Polignac number, because 20221377 - 2¹⁰ = 20220353 is a prime.

It is a super-2 number, since 2×20221377² = 817808175552258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20221379) 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 15 ways as a sum of consecutive naturals, for example, 15499 + ... + 16752.

It is an arithmetic number, because the mean of its divisors is an integer number (1935120).

Almost surely, 2^20221377 is an apocalyptic number.

It is an amenable number.

20221377 is a deficient number, since it is larger than the sum of its proper divisors (10740543).

20221377 is a wasteful number, since it uses less digits than its factorization.

20221377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32284.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 20221377 is about 4496.8185420361. The cubic root of 20221377 is about 272.4396050539.

Adding to 20221377 its reverse (77312202), we get a palindrome (97533579).

The spelling of 20221377 in words is "twenty million, two hundred twenty-one thousand, three hundred seventy-seven".