20377159 has 4 divisors (see below), whose sum is σ = 22229640. Its totient is φ = 18524680.

The previous prime is 20377157. The next prime is 20377163. The reversal of 20377159 is 95177302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20377159 - 2¹ = 20377157 is a prime.

It is a super-2 number, since 2×20377159² = 830457217822562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20377153) 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, 926224 + ... + 926245.

It is an arithmetic number, because the mean of its divisors is an integer number (5557410).

Almost surely, 2^20377159 is an apocalyptic number.

20377159 is a deficient number, since it is larger than the sum of its proper divisors (1852481).

20377159 is a wasteful number, since it uses less digits than its factorization.

20377159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852480.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 20377159 is about 4514.1066668833. The cubic root of 20377159 is about 273.1374253869.

The spelling of 20377159 in words is "twenty million, three hundred seventy-seven thousand, one hundred fifty-nine".