21455525530154 has 8 divisors (see below), whose sum is σ = 32790520150020. Its totient is φ = 10525352146816.

The previous prime is 21455525530111. The next prime is 21455525530157. The reversal of 21455525530154 is 45103552555412.

It can be written as a sum of positive squares in 2 ways, for example, as 19522938999529 + 1932586530625 = 4418477^2 + 1390175^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21455525530099 and 21455525530108.

It is not an unprimeable number, because it can be changed into a prime (21455525530157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101205308999 + ... + 101205309210.

Almost surely, 2^{21455525530154} is an apocalyptic number.

21455525530154 is a deficient number, since it is larger than the sum of its proper divisors (11334994619866).

21455525530154 is a wasteful number, since it uses less digits than its factorization.

21455525530154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202410618264.

The product of its (nonzero) digits is 3000000, while the sum is 47.

The spelling of 21455525530154 in words is "twenty-one trillion, four hundred fifty-five billion, five hundred twenty-five million, five hundred thirty thousand, one hundred fifty-four".