20387832379 has 4 divisors (see below), whose sum is σ = 20733388920. Its totient is φ = 20042275840.

The previous prime is 20387832337. The next prime is 20387832407. The reversal of 20387832379 is 97323878302.

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 20387832379 - 2⁷ = 20387832251 is a prime.

It is a super-2 number, since 2×20387832379² (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 (20387832319) 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, 172778182 + ... + 172778299.

It is an arithmetic number, because the mean of its divisors is an integer number (5183347230).

Almost surely, 2^20387832379 is an apocalyptic number.

20387832379 is a deficient number, since it is larger than the sum of its proper divisors (345556541).

20387832379 is an equidigital number, since it uses as much as digits as its factorization.

20387832379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345556540.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 20387832379 in words is "twenty billion, three hundred eighty-seven million, eight hundred thirty-two thousand, three hundred seventy-nine".