19920677 has 4 divisors (see below), whose sum is σ = 22766496. Its totient is φ = 17074860.

The previous prime is 19920673. The next prime is 19920707. The reversal of 19920677 is 77602991.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 77602991 = 2531 ⋅30661.

It is a cyclic number.

It is not a de Polignac number, because 19920677 - 2² = 19920673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19920671) 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, 1422899 + ... + 1422912.

It is an arithmetic number, because the mean of its divisors is an integer number (5691624).

Almost surely, 2^19920677 is an apocalyptic number.

It is an amenable number.

19920677 is a deficient number, since it is larger than the sum of its proper divisors (2845819).

19920677 is an equidigital number, since it uses as much as digits as its factorization.

19920677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845818.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 19920677 is about 4463.2585629784. The cubic root of 19920677 is about 271.0824266000.

The spelling of 19920677 in words is "nineteen million, nine hundred twenty thousand, six hundred seventy-seven".