20550330531 has 16 divisors (see below), whose sum is σ = 30447597600. Its totient is φ = 13699021824.

The previous prime is 20550330527. The next prime is 20550330553. The reversal of 20550330531 is 13503305502.

It is not a de Polignac number, because 20550330531 - 2² = 20550330527 is a prime.

It is a super-3 number, since 3×20550330531³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20550330495 and 20550330504.

It is not an unprimeable number, because it can be changed into a prime (20550330511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369775 + ... + 421703.

It is an arithmetic number, because the mean of its divisors is an integer number (1902974850).

Almost surely, 2^20550330531 is an apocalyptic number.

20550330531 is a deficient number, since it is larger than the sum of its proper divisors (9897267069).

20550330531 is a wasteful number, since it uses less digits than its factorization.

20550330531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66595 (or 66589 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 27.

The spelling of 20550330531 in words is "twenty billion, five hundred fifty million, three hundred thirty thousand, five hundred thirty-one".