20146993879 has 16 divisors (see below), whose sum is σ = 21454119648. Its totient is φ = 18853650432.

The previous prime is 20146993877. The next prime is 20146993903. The reversal of 20146993879 is 97839964102.

It is a cyclic number.

It is not a de Polignac number, because 20146993879 - 2¹ = 20146993877 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 (20146993871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3381367 + ... + 3387319.

It is an arithmetic number, because the mean of its divisors is an integer number (1340882478).

Almost surely, 2^20146993879 is an apocalyptic number.

20146993879 is a deficient number, since it is larger than the sum of its proper divisors (1307125769).

20146993879 is a wasteful number, since it uses less digits than its factorization.

20146993879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 20146993879 in words is "twenty billion, one hundred forty-six million, nine hundred ninety-three thousand, eight hundred seventy-nine".