20879436019 has 16 divisors (see below), whose sum is σ = 22967237664. Its totient is φ = 18862272000.

The previous prime is 20879435981. The next prime is 20879436049. The reversal of 20879436019 is 91063497802.

It is not a de Polignac number, because 20879436019 - 2¹⁹ = 20878911731 is a prime.

It is a super-2 number, since 2×20879436019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20879436049) 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, 238504 + ... + 314074.

It is an arithmetic number, because the mean of its divisors is an integer number (1435452354).

Almost surely, 2^20879436019 is an apocalyptic number.

20879436019 is a deficient number, since it is larger than the sum of its proper divisors (2087801645).

20879436019 is a wasteful number, since it uses less digits than its factorization.

20879436019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76038.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 20879436019 in words is "twenty billion, eight hundred seventy-nine million, four hundred thirty-six thousand, nineteen".