21499474039 has 8 divisors (see below), whose sum is σ = 22069866560. Its totient is φ = 20936537856.

The previous prime is 21499474027. The next prime is 21499474069. The reversal of 21499474039 is 93047499412.

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 21499474039 - 2⁷ = 21499473911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21499474069) 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, 1858242 + ... + 1869775.

It is an arithmetic number, because the mean of its divisors is an integer number (2758733320).

Almost surely, 2^21499474039 is an apocalyptic number.

21499474039 is a deficient number, since it is larger than the sum of its proper divisors (570392521).

21499474039 is an equidigital number, since it uses as much as digits as its factorization.

21499474039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728169.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 21499474039 in words is "twenty-one billion, four hundred ninety-nine million, four hundred seventy-four thousand, thirty-nine".