21213545032460 has 48 divisors (see below), whose sum is σ = 48787401751200. Its totient is φ = 7684000727040.

The previous prime is 21213545032423. The next prime is 21213545032483. The reversal of 21213545032460 is 6423054531212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187541135 + ... + 187654214.

It is an arithmetic number, because the mean of its divisors is an integer number (1016404203150).

Almost surely, 2^{21213545032460} is an apocalyptic number.

21213545032460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213545032460 is an abundant number, since it is smaller than the sum of its proper divisors (27573856718740).

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

21213545032460 is a wasteful number, since it uses less digits than its factorization.

21213545032460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375195626 (or 375195624 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 21213545032460 its reverse (6423054531212), we get a palindrome (27636599563672).

The spelling of 21213545032460 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, thirty-two thousand, four hundred sixty".