21376026028 has 24 divisors (see below), whose sum is σ = 44610838272. Its totient is φ = 8762842704.

The previous prime is 21376025989. The next prime is 21376026029. The reversal of 21376026028 is 82062067312.

It is not an unprimeable number, because it can be changed into a prime (21376026029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16595650 + ... + 16596937.

It is an arithmetic number, because the mean of its divisors is an integer number (1858784928).

Almost surely, 2^21376026028 is an apocalyptic number.

21376026028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21376026028 is an abundant number, since it is smaller than the sum of its proper divisors (23234812244).

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

21376026028 is a wasteful number, since it uses less digits than its factorization.

21376026028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33192621 (or 33192619 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 21376026028 in words is "twenty-one billion, three hundred seventy-six million, twenty-six thousand, twenty-eight".