21830028147 has 8 divisors (see below), whose sum is σ = 32340782480. Its totient is φ = 14553352080.

The previous prime is 21830028133. The next prime is 21830028161. The reversal of 21830028147 is 74182003812.

It is an interprime number because it is at equal distance from previous prime (21830028133) and next prime (21830028161).

It is not a de Polignac number, because 21830028147 - 2²⁴ = 21813250931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21830028047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404259754 + ... + 404259807.

It is an arithmetic number, because the mean of its divisors is an integer number (4042597810).

Almost surely, 2^21830028147 is an apocalyptic number.

21830028147 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21830028147 is a deficient number, since it is larger than the sum of its proper divisors (10510754333).

21830028147 is an equidigital number, since it uses as much as digits as its factorization.

21830028147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808519570 (or 808519564 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 21830028147 in words is "twenty-one billion, eight hundred thirty million, twenty-eight thousand, one hundred forty-seven".