21838849413 has 8 divisors (see below), whose sum is σ = 30651016800. Its totient is φ = 13792957488.

The previous prime is 21838849399. The next prime is 21838849427. The reversal of 21838849413 is 31494883812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21838849399) and next prime (21838849427).

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

It is not a de Polignac number, because 21838849413 - 2⁵ = 21838849381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21838849463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191568798 + ... + 191568911.

It is an arithmetic number, because the mean of its divisors is an integer number (3831377100).

Almost surely, 2^21838849413 is an apocalyptic number.

It is an amenable number.

21838849413 is a deficient number, since it is larger than the sum of its proper divisors (8812167387).

21838849413 is a wasteful number, since it uses less digits than its factorization.

21838849413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383137731.

The product of its digits is 1327104, while the sum is 51.

The spelling of 21838849413 in words is "twenty-one billion, eight hundred thirty-eight million, eight hundred forty-nine thousand, four hundred thirteen".