21929943219 has 8 divisors (see below), whose sum is σ = 29426166480. Its totient is φ = 14526841056.

The previous prime is 21929943209. The next prime is 21929943221. The reversal of 21929943219 is 91234992912.

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

It is not a de Polignac number, because 21929943219 - 2⁹ = 21929942707 is a prime.

It is a super-2 number, since 2×21929943219² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21929943209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23279724 + ... + 23280665.

It is an arithmetic number, because the mean of its divisors is an integer number (3678270810).

Almost surely, 2^21929943219 is an apocalyptic number.

21929943219 is a deficient number, since it is larger than the sum of its proper divisors (7496223261).

21929943219 is a wasteful number, since it uses less digits than its factorization.

21929943219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46560549.

The product of its digits is 629856, while the sum is 51.

The spelling of 21929943219 in words is "twenty-one billion, nine hundred twenty-nine million, nine hundred forty-three thousand, two hundred nineteen".