20951938219 has 8 divisors (see below), whose sum is σ = 20975967360. Its totient is φ = 20927926656.

The previous prime is 20951938207. The next prime is 20951938283. The reversal of 20951938219 is 91283915902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20951938219 - 2⁵ = 20951938187 is a prime.

It is a super-2 number, since 2×20951938219² (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 (20951938289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4709254 + ... + 4713700.

It is an arithmetic number, because the mean of its divisors is an integer number (2621995920).

Almost surely, 2^20951938219 is an apocalyptic number.

20951938219 is a deficient number, since it is larger than the sum of its proper divisors (24029141).

20951938219 is a wasteful number, since it uses less digits than its factorization.

20951938219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8789.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 20951938219 in words is "twenty billion, nine hundred fifty-one million, nine hundred thirty-eight thousand, two hundred nineteen".