21532030312443 has 32 divisors (see below), whose sum is σ = 34765411921920. Its totient is φ = 11572032552960.

The previous prime is 21532030312417. The next prime is 21532030312469. The reversal of 21532030312443 is 34421303023512.

It is an interprime number because it is at equal distance from previous prime (21532030312417) and next prime (21532030312469).

It is not a de Polignac number, because 21532030312443 - 2⁹ = 21532030311931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21532030312343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20900043 + ... + 21906068.

It is an arithmetic number, because the mean of its divisors is an integer number (1086419122560).

Almost surely, 2^{21532030312443} is an apocalyptic number.

21532030312443 is a deficient number, since it is larger than the sum of its proper divisors (13233381609477).

21532030312443 is a wasteful number, since it uses less digits than its factorization.

21532030312443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42807547.

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 21532030312443 its reverse (34421303023512), we get a palindrome (55953333335955).

The spelling of 21532030312443 in words is "twenty-one trillion, five hundred thirty-two billion, thirty million, three hundred twelve thousand, four hundred forty-three".