20011829819 has 4 divisors (see below), whose sum is σ = 21065084040. Its totient is φ = 18958575600.

The previous prime is 20011829797. The next prime is 20011829833. The reversal of 20011829819 is 91892811002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20011829819 - 2²⁴ = 19995052603 is a prime.

It is a super-2 number, since 2×20011829819² (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 (20011829839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526627082 + ... + 526627119.

It is an arithmetic number, because the mean of its divisors is an integer number (5266271010).

Almost surely, 2^20011829819 is an apocalyptic number.

20011829819 is a deficient number, since it is larger than the sum of its proper divisors (1053254221).

20011829819 is a wasteful number, since it uses less digits than its factorization.

20011829819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053254220.

The product of its (nonzero) digits is 20736, while the sum is 41.

The spelling of 20011829819 in words is "twenty billion, eleven million, eight hundred twenty-nine thousand, eight hundred nineteen".