21024666616653 has 48 divisors (see below), whose sum is σ = 35525453648256. Its totient is φ = 11731089807360.

The previous prime is 21024666616637. The next prime is 21024666616661. The reversal of 21024666616653 is 35661666642012.

It is not a de Polignac number, because 21024666616653 - 2⁴ = 21024666616637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21024666616653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024666611653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7631773 + ... + 10014653.

It is an arithmetic number, because the mean of its divisors is an integer number (740113617672).

Almost surely, 2^{21024666616653} is an apocalyptic number.

It is an amenable number.

21024666616653 is a deficient number, since it is larger than the sum of its proper divisors (14500787031603).

21024666616653 is a wasteful number, since it uses less digits than its factorization.

21024666616653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386194 (or 2386191 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 21024666616653 in words is "twenty-one trillion, twenty-four billion, six hundred sixty-six million, six hundred sixteen thousand, six hundred fifty-three".