21152666250451 has 8 divisors (see below), whose sum is σ = 21693110952960. Its totient is φ = 20615987713608.

The previous prime is 21152666250367. The next prime is 21152666250461. The reversal of 21152666250451 is 15405266625112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21152666250451 - 2¹⁷ = 21152666119379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21152666250461) 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, 941530041 + ... + 941552506.

It is an arithmetic number, because the mean of its divisors is an integer number (2711638869120).

Almost surely, 2^{21152666250451} is an apocalyptic number.

21152666250451 is a deficient number, since it is larger than the sum of its proper divisors (540444702509).

21152666250451 is a wasteful number, since it uses less digits than its factorization.

21152666250451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883082833.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 21152666250451 in words is "twenty-one trillion, one hundred fifty-two billion, six hundred sixty-six million, two hundred fifty thousand, four hundred fifty-one".