20400220219 has 16 divisors (see below), whose sum is σ = 21661829280. Its totient is φ = 19158094080.

The previous prime is 20400220213. The next prime is 20400220223. The reversal of 20400220219 is 91202200402.

It is a cyclic number.

It is not a de Polignac number, because 20400220219 - 2⁵ = 20400220187 is a prime.

It is a super-2 number, since 2×20400220219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20400220219.

It is not an unprimeable number, because it can be changed into a prime (20400220213) 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, 1080807 + ... + 1099519.

It is an arithmetic number, because the mean of its divisors is an integer number (1353864330).

Almost surely, 2^20400220219 is an apocalyptic number.

20400220219 is a deficient number, since it is larger than the sum of its proper divisors (1261609061).

20400220219 is a wasteful number, since it uses less digits than its factorization.

20400220219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19230.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 20400220219 in words is "twenty billion, four hundred million, two hundred twenty thousand, two hundred nineteen".