20377873 has 4 divisors (see below), whose sum is σ = 20417508. Its totient is φ = 20338240.

The previous prime is 20377871. The next prime is 20377879. The reversal of 20377873 is 37877302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37877302 = 2 ⋅18938651.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 16265089 = 2028^2 + 4033^2 .

It is a cyclic number.

It is not a de Polignac number, because 20377873 - 2¹ = 20377871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20377871) 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, 19036 + ... + 20077.

It is an arithmetic number, because the mean of its divisors is an integer number (5104377).

Almost surely, 2^20377873 is an apocalyptic number.

It is an amenable number.

20377873 is a deficient number, since it is larger than the sum of its proper divisors (39635).

20377873 is an equidigital number, since it uses as much as digits as its factorization.

20377873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39634.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 20377873 is about 4514.1857516057. The cubic root of 20377873 is about 273.1406155249.

The spelling of 20377873 in words is "twenty million, three hundred seventy-seven thousand, eight hundred seventy-three".