21870003667 has 8 divisors (see below), whose sum is σ = 21993080832. Its totient is φ = 21747016200.

The previous prime is 21870003641. The next prime is 21870003671. The reversal of 21870003667 is 76630007812.

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

It is a cyclic number.

It is not a de Polignac number, because 21870003667 - 2⁷ = 21870003539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21870003677) 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, 500658 + ... + 542584.

It is an arithmetic number, because the mean of its divisors is an integer number (2749135104).

Almost surely, 2^21870003667 is an apocalyptic number.

21870003667 is a deficient number, since it is larger than the sum of its proper divisors (123077165).

21870003667 is a wasteful number, since it uses less digits than its factorization.

21870003667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44849.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 21870003667 in words is "twenty-one billion, eight hundred seventy million, three thousand, six hundred sixty-seven".