20387832819 has 8 divisors (see below), whose sum is σ = 27762155520. Its totient is φ = 13302699336.

The previous prime is 20387832781. The next prime is 20387832847. The reversal of 20387832819 is 91823878302.

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

It is not a de Polignac number, because 20387832819 - 2⁷ = 20387832691 is a prime.

It is a super-2 number, since 2×20387832819² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20387832889) 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, 72297139 + ... + 72297420.

It is an arithmetic number, because the mean of its divisors is an integer number (3470269440).

Almost surely, 2^20387832819 is an apocalyptic number.

20387832819 is a deficient number, since it is larger than the sum of its proper divisors (7374322701).

20387832819 is a wasteful number, since it uses less digits than its factorization.

20387832819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144594609.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 20387832819 in words is "twenty billion, three hundred eighty-seven million, eight hundred thirty-two thousand, eight hundred nineteen".