21043534092 has 24 divisors (see below), whose sum is σ = 56116091136. Its totient is φ = 6012438288.

The previous prime is 21043534091. The next prime is 21043534121. The reversal of 21043534092 is 29043534012.

It is not an unprimeable number, because it can be changed into a prime (21043534091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125259048 + ... + 125259215.

It is an arithmetic number, because the mean of its divisors is an integer number (2338170464).

Almost surely, 2^21043534092 is an apocalyptic number.

It is an amenable number.

21043534092 is an abundant number, since it is smaller than the sum of its proper divisors (35072557044).

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

21043534092 is a wasteful number, since it uses less digits than its factorization.

21043534092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250518277 (or 250518275 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 21043534092 in words is "twenty-one billion, forty-three million, five hundred thirty-four thousand, ninety-two".