20330251668 has 24 divisors (see below), whose sum is σ = 52708060160. Its totient is φ = 6776750520.

The previous prime is 20330251661. The next prime is 20330251673. The reversal of 20330251668 is 86615203302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330251661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94121428 + ... + 94121643.

Almost surely, 2^20330251668 is an apocalyptic number.

It is an amenable number.

20330251668 is an abundant number, since it is smaller than the sum of its proper divisors (32377808492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20330251668 is a wasteful number, since it uses less digits than its factorization.

20330251668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188243084 (or 188243076 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 20330251668 in words is "twenty billion, three hundred thirty million, two hundred fifty-one thousand, six hundred sixty-eight".