439194000021 has 32 divisors (see below), whose sum is σ = 685753786368. Its totient is φ = 244781592960.

The previous prime is 439194000019. The next prime is 439194000073. The reversal of 439194000021 is 120000491934.

It is not a de Polignac number, because 439194000021 - 2¹ = 439194000019 is a prime.

It is a super-2 number, since 2×439194000021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439194000221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3260020 + ... + 3392066.

It is an arithmetic number, because the mean of its divisors is an integer number (21429805824).

Almost surely, 2^439194000021 is an apocalyptic number.

439194000021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

439194000021 is a deficient number, since it is larger than the sum of its proper divisors (246559786347).

439194000021 is a wasteful number, since it uses less digits than its factorization.

439194000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135961.

The product of its (nonzero) digits is 7776, while the sum is 33.

Adding to 439194000021 its reverse (120000491934), we get a palindrome (559194491955).

The spelling of 439194000021 in words is "four hundred thirty-nine billion, one hundred ninety-four million, twenty-one", and thus it is an aban number.