21263530303464 has 32 divisors (see below), whose sum is σ = 53158948103520. Its totient is φ = 7087827121856.

The previous prime is 21263530303403. The next prime is 21263530303471. The reversal of 21263530303464 is 46430303536212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14360899 + ... + 15772205.

It is an arithmetic number, because the mean of its divisors is an integer number (1661217128235).

Almost surely, 2^{21263530303464} is an apocalyptic number.

21263530303464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21263530303464 is an abundant number, since it is smaller than the sum of its proper divisors (31895417800056).

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

21263530303464 is a wasteful number, since it uses less digits than its factorization.

21263530303464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2039089 (or 2039085 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 42.

Adding to 21263530303464 its reverse (46430303536212), we get a palindrome (67693833839676).

The spelling of 21263530303464 in words is "twenty-one trillion, two hundred sixty-three billion, five hundred thirty million, three hundred three thousand, four hundred sixty-four".