21510369532 has 12 divisors (see below), whose sum is σ = 37644509056. Its totient is φ = 10754795520.

The previous prime is 21510369481. The next prime is 21510369533. The reversal of 21510369532 is 23596301512.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 21510369491 and 21510369500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21510369533) 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, 52732 + ... + 214012.

Almost surely, 2^21510369532 is an apocalyptic number.

It is an amenable number.

21510369532 is a deficient number, since it is larger than the sum of its proper divisors (16134139524).

21510369532 is a wasteful number, since it uses less digits than its factorization.

21510369532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194628 (or 194626 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

It can be divided in two parts, 215103 and 69532, that added together give a triangular number (284635 = T₇₅₄).

The spelling of 21510369532 in words is "twenty-one billion, five hundred ten million, three hundred sixty-nine thousand, five hundred thirty-two".