21041550534 has 8 divisors (see below), whose sum is σ = 42083101080. Its totient is φ = 7013850176.

The previous prime is 21041550533. The next prime is 21041550559. The reversal of 21041550534 is 43505514012.

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

21041550534 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041550533) 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, 1753462539 + ... + 1753462550.

It is an arithmetic number, because the mean of its divisors is an integer number (5260387635).

Almost surely, 2^21041550534 is an apocalyptic number.

21041550534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21041550534 is a wasteful number, since it uses less digits than its factorization.

21041550534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506925094.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21041550534 in words is "twenty-one billion, forty-one million, five hundred fifty thousand, five hundred thirty-four".