20861198465530 has 8 divisors (see below), whose sum is σ = 37550157237972. Its totient is φ = 8344479386208.

The previous prime is 20861198465441. The next prime is 20861198465539. The reversal of 20861198465530 is 3556489116802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20755668993921 + 105529471609 = 4555839^2 + 324853^2 .

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

It is a super-3 number, since 3×20861198465530³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20861198465539) 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, 1043059923267 + ... + 1043059923286.

Almost surely, 2^{20861198465530} is an apocalyptic number.

20861198465530 is a deficient number, since it is larger than the sum of its proper divisors (16688958772442).

20861198465530 is a wasteful number, since it uses less digits than its factorization.

20861198465530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086119846560.

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 20861198465530 in words is "twenty trillion, eight hundred sixty-one billion, one hundred ninety-eight million, four hundred sixty-five thousand, five hundred thirty".