21038717476 has 48 divisors (see below), whose sum is σ = 42584572800. Its totient is φ = 8908086528.

The previous prime is 21038717467. The next prime is 21038717477. The reversal of 21038717476 is 67471783012.

It is a super-3 number, since 3×21038717476³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21038717477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4051890 + ... + 4057078.

It is an arithmetic number, because the mean of its divisors is an integer number (887178600).

Almost surely, 2^21038717476 is an apocalyptic number.

It is an amenable number.

21038717476 is an abundant number, since it is smaller than the sum of its proper divisors (21545855324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21038717476 is a wasteful number, since it uses less digits than its factorization.

21038717476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916 (or 6914 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 21038717476 in words is "twenty-one billion, thirty-eight million, seven hundred seventeen thousand, four hundred seventy-six".