38449510021 has 16 divisors (see below), whose sum is σ = 43227676800. Its totient is φ = 33932859840.

The previous prime is 38449510013. The next prime is 38449510027. The reversal of 38449510021 is 12001594483.

It is a cyclic number.

It is not a de Polignac number, because 38449510021 - 2³ = 38449510013 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 (38449510027) 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 15 ways as a sum of consecutive naturals, for example, 635130 + ... + 693028.

It is an arithmetic number, because the mean of its divisors is an integer number (2701729800).

Almost surely, 2^38449510021 is an apocalyptic number.

It is an amenable number.

38449510021 is a deficient number, since it is larger than the sum of its proper divisors (4778166779).

38449510021 is a wasteful number, since it uses less digits than its factorization.

38449510021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60156.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 38449510021 in words is "thirty-eight billion, four hundred forty-nine million, five hundred ten thousand, twenty-one".