20046430879 has 4 divisors (see below), whose sum is σ = 20162306376. Its totient is φ = 19930555384.

The previous prime is 20046430849. The next prime is 20046430883. The reversal of 20046430879 is 97803464002.

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 20046430879 - 2⁷ = 20046430751 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 (20046430819) 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, 57937489 + ... + 57937834.

It is an arithmetic number, because the mean of its divisors is an integer number (5040576594).

Almost surely, 2^20046430879 is an apocalyptic number.

20046430879 is a deficient number, since it is larger than the sum of its proper divisors (115875497).

20046430879 is a wasteful number, since it uses less digits than its factorization.

20046430879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115875496.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20046430879 in words is "twenty billion, forty-six million, four hundred thirty thousand, eight hundred seventy-nine".