20071879 has 4 divisors (see below), whose sum is σ = 20094640. Its totient is φ = 20049120.

The previous prime is 20071873. The next prime is 20071901. The reversal of 20071879 is 97817002.

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 20071879 - 2⁹ = 20071367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20071873) 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, 10002 + ... + 11839.

It is an arithmetic number, because the mean of its divisors is an integer number (5023660).

Almost surely, 2^20071879 is an apocalyptic number.

20071879 is a deficient number, since it is larger than the sum of its proper divisors (22761).

20071879 is an equidigital number, since it uses as much as digits as its factorization.

20071879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22760.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 20071879 is about 4480.1650639234. The cubic root of 20071879 is about 271.7665555784.

The spelling of 20071879 in words is "twenty million, seventy-one thousand, eight hundred seventy-nine".