20191377 has 8 divisors (see below), whose sum is σ = 26993664. Its totient is φ = 13425008.

The previous prime is 20191351. The next prime is 20191387. The reversal of 20191377 is 77319102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20191377 - 2¹¹ = 20189329 is a prime.

It is a super-2 number, since 2×20191377² = 815383410312258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20191387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7638 + ... + 9935.

It is an arithmetic number, because the mean of its divisors is an integer number (3374208).

Almost surely, 2^20191377 is an apocalyptic number.

It is an amenable number.

20191377 is a deficient number, since it is larger than the sum of its proper divisors (6802287).

20191377 is a wasteful number, since it uses less digits than its factorization.

20191377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17959.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 20191377 is about 4493.4816122913. The cubic root of 20191377 is about 272.3048098593.

The spelling of 20191377 in words is "twenty million, one hundred ninety-one thousand, three hundred seventy-seven".