20377161 has 24 divisors (see below), whose sum is σ = 33843264. Its totient is φ = 11573280.

The previous prime is 20377157. The next prime is 20377163. The reversal of 20377161 is 16177302.

It is not a de Polignac number, because 20377161 - 2² = 20377157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20377163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10510 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (1410136).

Almost surely, 2^20377161 is an apocalyptic number.

20377161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20377161 is a deficient number, since it is larger than the sum of its proper divisors (13466103).

20377161 is a wasteful number, since it uses less digits than its factorization.

20377161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20377161 is about 4514.1068884110. The cubic root of 20377161 is about 273.1374343230.

The spelling of 20377161 in words is "twenty million, three hundred seventy-seven thousand, one hundred sixty-one".