19922977 has 4 divisors (see below), whose sum is σ = 19934896. Its totient is φ = 19911060.

The previous prime is 19922923. The next prime is 19922993. The reversal of 19922977 is 77922991.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19922977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19923977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2943 + ... + 6964.

It is an arithmetic number, because the mean of its divisors is an integer number (4983724).

Almost surely, 2^19922977 is an apocalyptic number.

It is an amenable number.

19922977 is a deficient number, since it is larger than the sum of its proper divisors (11919).

19922977 is an equidigital number, since it uses as much as digits as its factorization.

19922977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11918.

The product of its digits is 142884, while the sum is 46.

The square root of 19922977 is about 4463.5162148244. The cubic root of 19922977 is about 271.0928590699.

The spelling of 19922977 in words is "nineteen million, nine hundred twenty-two thousand, nine hundred seventy-seven".