21529053596 has 12 divisors (see below), whose sum is σ = 39658783080. Its totient is φ = 10197972720.

The previous prime is 21529053593. The next prime is 21529053599. The reversal of 21529053596 is 69535092512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21529053593) and next prime (21529053599).

It is a self number, because there is not a number n which added to its sum of digits gives 21529053596.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21529053593) 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, 141638435 + ... + 141638586.

It is an arithmetic number, because the mean of its divisors is an integer number (3304898590).

Almost surely, 2^21529053596 is an apocalyptic number.

It is an amenable number.

21529053596 is a deficient number, since it is larger than the sum of its proper divisors (18129729484).

21529053596 is a wasteful number, since it uses less digits than its factorization.

21529053596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283277044 (or 283277042 counting only the distinct ones).

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 21529053596 in words is "twenty-one billion, five hundred twenty-nine million, fifty-three thousand, five hundred ninety-six".