20988251333 has 32 divisors (see below), whose sum is σ = 25817149440. Its totient is φ = 16660486080.

The previous prime is 20988251327. The next prime is 20988251351. The reversal of 20988251333 is 33315288902.

It is not a de Polignac number, because 20988251333 - 2⁸ = 20988251077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988251353) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7381010 + ... + 7383852.

It is an arithmetic number, because the mean of its divisors is an integer number (806785920).

Almost surely, 2^20988251333 is an apocalyptic number.

It is an amenable number.

20988251333 is a deficient number, since it is larger than the sum of its proper divisors (4828898107).

20988251333 is a wasteful number, since it uses less digits than its factorization.

20988251333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 20988251333 in words is "twenty billion, nine hundred eighty-eight million, two hundred fifty-one thousand, three hundred thirty-three".