20885545331 has 12 divisors (see below), whose sum is σ = 24304209480. Its totient is φ = 17895427200.

The previous prime is 20885545321. The next prime is 20885545333. The reversal of 20885545331 is 13354558802.

It is not a de Polignac number, because 20885545331 - 2¹⁸ = 20885283187 is a prime.

It is a super-3 number, since 3×20885545331³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20885545333) 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, 62531 + ... + 213731.

It is an arithmetic number, because the mean of its divisors is an integer number (2025350790).

Almost surely, 2^20885545331 is an apocalyptic number.

20885545331 is a deficient number, since it is larger than the sum of its proper divisors (3418664149).

20885545331 is a wasteful number, since it uses less digits than its factorization.

20885545331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154034 (or 154027 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 20885545331 in words is "twenty billion, eight hundred eighty-five million, five hundred forty-five thousand, three hundred thirty-one".