20378867 has 2 divisors, whose sum is σ = 20378868. Its totient is φ = 20378866.

The previous prime is 20378863. The next prime is 20378933. The reversal of 20378867 is 76887302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20378867 - 2² = 20378863 is a prime.

It is not a weakly prime, because it can be changed into another prime (20378863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10189433 + 10189434.

It is an arithmetic number, because the mean of its divisors is an integer number (10189434).

Almost surely, 2^20378867 is an apocalyptic number.

20378867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20378867 is an equidigital number, since it uses as much as digits as its factorization.

20378867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 20378867 is about 4514.2958476378. The cubic root of 20378867 is about 273.1450565732.

The spelling of 20378867 in words is "twenty million, three hundred seventy-eight thousand, eight hundred sixty-seven".