20861522299 has 8 divisors (see below), whose sum is σ = 21488936768. Its totient is φ = 20237454720.

The previous prime is 20861522293. The next prime is 20861522329. The reversal of 20861522299 is 99222516802.

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

It is a cyclic number.

It is not a de Polignac number, because 20861522299 - 2³ = 20861522291 is a prime.

It is a super-2 number, since 2×20861522299² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20861522291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824067 + ... + 849004.

It is an arithmetic number, because the mean of its divisors is an integer number (2686117096).

Almost surely, 2^20861522299 is an apocalyptic number.

20861522299 is a deficient number, since it is larger than the sum of its proper divisors (627414469).

20861522299 is a wasteful number, since it uses less digits than its factorization.

20861522299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673445.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 20861522299 in words is "twenty billion, eight hundred sixty-one million, five hundred twenty-two thousand, two hundred ninety-nine".