21213692529 has 8 divisors (see below), whose sum is σ = 28298407200. Its totient is φ = 14135719776.

The previous prime is 21213692519. The next prime is 21213692537. The reversal of 21213692529 is 92529631212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21213692529 - 2¹¹ = 21213690481 is a prime.

It is a super-4 number, since 4×21213692529⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21213692519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678132 + ... + 1690725.

It is an arithmetic number, because the mean of its divisors is an integer number (3537300900).

Almost surely, 2^21213692529 is an apocalyptic number.

It is an amenable number.

21213692529 is a deficient number, since it is larger than the sum of its proper divisors (7084714671).

21213692529 is a wasteful number, since it uses less digits than its factorization.

21213692529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370959.

The product of its digits is 116640, while the sum is 42.

The spelling of 21213692529 in words is "twenty-one billion, two hundred thirteen million, six hundred ninety-two thousand, five hundred twenty-nine".