20377879 has 2 divisors, whose sum is σ = 20377880. Its totient is φ = 20377878.

The previous prime is 20377871. The next prime is 20377913. The reversal of 20377879 is 97877302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20377879 - 2³ = 20377871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20377871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188939 + 10188940.

It is an arithmetic number, because the mean of its divisors is an integer number (10188940).

Almost surely, 2^20377879 is an apocalyptic number.

20377879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20377879 is an equidigital number, since it uses as much as digits as its factorization.

20377879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 20377879 is about 4514.1864161773. The cubic root of 20377879 is about 273.1406423324.

The spelling of 20377879 in words is "twenty million, three hundred seventy-seven thousand, eight hundred seventy-nine".