21150011336453 has 8 divisors (see below), whose sum is σ = 22400226675288. Its totient is φ = 19900473444864.

The previous prime is 21150011336437. The next prime is 21150011336491. The reversal of 21150011336453 is 35463311005112.

It can be written as a sum of positive squares in 4 ways, for example, as 3816170064004 + 17333841272449 = 1953502^2 + 4163393^2 .

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

It is not a de Polignac number, because 21150011336453 - 2⁴ = 21150011336437 is a prime.

It is a super-4 number, since 4×21150011336453⁴ (a number of 54 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150011336413) 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, 169297526 + ... + 169422407.

It is an arithmetic number, because the mean of its divisors is an integer number (2800028334411).

Almost surely, 2^{21150011336453} is an apocalyptic number.

It is an amenable number.

21150011336453 is a deficient number, since it is larger than the sum of its proper divisors (1250215338835).

21150011336453 is a wasteful number, since it uses less digits than its factorization.

21150011336453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338723623.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 21150011336453 in words is "twenty-one trillion, one hundred fifty billion, eleven million, three hundred thirty-six thousand, four hundred fifty-three".