21152154230134 has 8 divisors (see below), whose sum is σ = 31841143201368. Its totient is φ = 10538439829680.

The previous prime is 21152154230131. The next prime is 21152154230153. The reversal of 21152154230134 is 43103245125112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21152154230134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152154230131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18818641992 + ... + 18818643115.

It is an arithmetic number, because the mean of its divisors is an integer number (3980142900171).

Almost surely, 2^{21152154230134} is an apocalyptic number.

21152154230134 is a deficient number, since it is larger than the sum of its proper divisors (10688988971234).

21152154230134 is a wasteful number, since it uses less digits than its factorization.

21152154230134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37637285390.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 21152154230134 its reverse (43103245125112), we get a palindrome (64255399355246).

The spelling of 21152154230134 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred fifty-four million, two hundred thirty thousand, one hundred thirty-four".