21151301305433 has 8 divisors (see below), whose sum is σ = 22780156153608. Its totient is φ = 19522708124544.

The previous prime is 21151301305423. The next prime is 21151301305457. The reversal of 21151301305433 is 33450310315112.

It can be written as a sum of positive squares in 4 ways, for example, as 303968076889 + 20847333228544 = 551333^2 + 4565888^2 .

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 21151301305433 - 2¹⁴ = 21151301289049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21151301305433.

It is not an unprimeable number, because it can be changed into a prime (21151301305423) 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, 65248916 + ... + 65572277.

It is an arithmetic number, because the mean of its divisors is an integer number (2847519519201).

Almost surely, 2^{21151301305433} is an apocalyptic number.

It is an amenable number.

21151301305433 is a deficient number, since it is larger than the sum of its proper divisors (1628854848175).

21151301305433 is a wasteful number, since it uses less digits than its factorization.

21151301305433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130833643.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 21151301305433 in words is "twenty-one trillion, one hundred fifty-one billion, three hundred one million, three hundred five thousand, four hundred thirty-three".