20121792219 has 12 divisors (see below), whose sum is σ = 29498615016. Its totient is φ = 13214310912.

The previous prime is 20121792209. The next prime is 20121792307. The reversal of 20121792219 is 91229712102.

It is a happy number.

It is not a de Polignac number, because 20121792219 - 2¹³ = 20121784027 is a prime.

It is a super-2 number, since 2×20121792219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121792209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16684134 + ... + 16685339.

It is an arithmetic number, because the mean of its divisors is an integer number (2458217918).

Almost surely, 2^20121792219 is an apocalyptic number.

20121792219 is a deficient number, since it is larger than the sum of its proper divisors (9376822797).

20121792219 is a wasteful number, since it uses less digits than its factorization.

20121792219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33369546 (or 33369543 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 20121792219 in words is "twenty billion, one hundred twenty-one million, seven hundred ninety-two thousand, two hundred nineteen".