21415330532 has 24 divisors (see below), whose sum is σ = 37886577120. Its totient is φ = 10590909440.

The previous prime is 21415330523. The next prime is 21415330561. The reversal of 21415330532 is 23503351412.

It is a happy number.

It is a super-2 number, since 2×21415330532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21415330495 and 21415330504.

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, 235319 + ... + 313377.

It is an arithmetic number, because the mean of its divisors is an integer number (1578607380).

Almost surely, 2^21415330532 is an apocalyptic number.

It is an amenable number.

21415330532 is a deficient number, since it is larger than the sum of its proper divisors (16471246588).

21415330532 is a wasteful number, since it uses less digits than its factorization.

21415330532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78811 (or 78809 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 21415330532 its reverse (23503351412), we get a palindrome (44918681944).

The spelling of 21415330532 in words is "twenty-one billion, four hundred fifteen million, three hundred thirty thousand, five hundred thirty-two".