21146554163530 has 8 divisors (see below), whose sum is σ = 38063797494372. Its totient is φ = 8458621665408.

The previous prime is 21146554163513. The next prime is 21146554163563. The reversal of 21146554163530 is 3536145564112.

It can be written as a sum of positive squares in 2 ways, for example, as 20628555845689 + 517998317841 = 4541867^2 + 719721^2 .

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

It is a super-2 number, since 2×21146554163530² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057327708167 + ... + 1057327708186.

Almost surely, 2^{21146554163530} is an apocalyptic number.

21146554163530 is a deficient number, since it is larger than the sum of its proper divisors (16917243330842).

21146554163530 is a wasteful number, since it uses less digits than its factorization.

21146554163530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114655416360.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 21146554163530 in words is "twenty-one trillion, one hundred forty-six billion, five hundred fifty-four million, one hundred sixty-three thousand, five hundred thirty".