21507532040506 has 8 divisors (see below), whose sum is σ = 32715682540704. Its totient is φ = 10602304526940.

The previous prime is 21507532040497. The next prime is 21507532040513. The reversal of 21507532040506 is 60504023570512.

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

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, 75730746480 + ... + 75730746763.

It is an arithmetic number, because the mean of its divisors is an integer number (4089460317588).

Almost surely, 2^{21507532040506} is an apocalyptic number.

21507532040506 is a deficient number, since it is larger than the sum of its proper divisors (11208150500198).

21507532040506 is a wasteful number, since it uses less digits than its factorization.

21507532040506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151461493316.

The product of its (nonzero) digits is 252000, while the sum is 40.

The spelling of 21507532040506 in words is "twenty-one trillion, five hundred seven billion, five hundred thirty-two million, forty thousand, five hundred six".