21351526532 has 12 divisors (see below), whose sum is σ = 42703053120. Its totient is φ = 9150654216.

The previous prime is 21351526531. The next prime is 21351526541. The reversal of 21351526532 is 23562515312.

21351526532 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21351526492 and 21351526501.

It is not an unprimeable number, because it can be changed into a prime (21351526531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381277232 + ... + 381277287.

It is an arithmetic number, because the mean of its divisors is an integer number (3558587760).

Almost surely, 2^21351526532 is an apocalyptic number.

It is an amenable number.

21351526532 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21351526532 is a wasteful number, since it uses less digits than its factorization.

21351526532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762554530 (or 762554528 counting only the distinct ones).

The product of its digits is 54000, while the sum is 35.

The spelling of 21351526532 in words is "twenty-one billion, three hundred fifty-one million, five hundred twenty-six thousand, five hundred thirty-two".