21533101324534 has 4 divisors (see below), whose sum is σ = 32299651986804. Its totient is φ = 10766550662266.

The previous prime is 21533101324523. The next prime is 21533101324543. The reversal of 21533101324534 is 43542310133512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21533101324493 and 21533101324502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5383275331132 + ... + 5383275331135.

It is an arithmetic number, because the mean of its divisors is an integer number (8074912996701).

Almost surely, 2^{21533101324534} is an apocalyptic number.

21533101324534 is a deficient number, since it is larger than the sum of its proper divisors (10766550662270).

21533101324534 is a wasteful number, since it uses less digits than its factorization.

21533101324534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766550662269.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 21533101324534 in words is "twenty-one trillion, five hundred thirty-three billion, one hundred one million, three hundred twenty-four thousand, five hundred thirty-four".