21852930069 has 12 divisors (see below), whose sum is σ = 31581160000. Its totient is φ = 14561320104.

The previous prime is 21852930061. The next prime is 21852930091. The reversal of 21852930069 is 96003925812.

It is not a de Polignac number, because 21852930069 - 2³ = 21852930061 is a prime.

It is a super-2 number, since 2×21852930069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852930061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 589339 + ... + 625320.

Almost surely, 2^21852930069 is an apocalyptic number.

It is an amenable number.

21852930069 is a deficient number, since it is larger than the sum of its proper divisors (9728229931).

21852930069 is a wasteful number, since it uses less digits than its factorization.

21852930069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216664 (or 1216661 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 21852930069 in words is "twenty-one billion, eight hundred fifty-two million, nine hundred thirty thousand, sixty-nine".