21496741828 has 24 divisors (see below), whose sum is σ = 38035519704. Its totient is φ = 10629696000.

The previous prime is 21496741817. The next prime is 21496741829. The reversal of 21496741828 is 82814769412.

It can be written as a sum of positive squares in 4 ways, for example, as 2717328384 + 18779413444 = 52128^2 + 137038^2 .

It is not an unprimeable number, because it can be changed into a prime (21496741829) 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, 325726 + ... + 386122.

It is an arithmetic number, because the mean of its divisors is an integer number (1584813321).

Almost surely, 2^21496741828 is an apocalyptic number.

It is an amenable number.

21496741828 is a deficient number, since it is larger than the sum of its proper divisors (16538777876).

21496741828 is a wasteful number, since it uses less digits than its factorization.

21496741828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61383 (or 61381 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The spelling of 21496741828 in words is "twenty-one billion, four hundred ninety-six million, seven hundred forty-one thousand, eight hundred twenty-eight".