20885338068 has 24 divisors (see below), whose sum is σ = 55694235072. Its totient is φ = 5967239424.

The previous prime is 20885338043. The next prime is 20885338093. The reversal of 20885338068 is 86083358802.

It is an interprime number because it is at equal distance from previous prime (20885338043) and next prime (20885338093).

It is a self number, because there is not a number n which added to its sum of digits gives 20885338068.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124317405 + ... + 124317572.

It is an arithmetic number, because the mean of its divisors is an integer number (2320593128).

Almost surely, 2^20885338068 is an apocalyptic number.

20885338068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20885338068 is an abundant number, since it is smaller than the sum of its proper divisors (34808897004).

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

20885338068 is a wasteful number, since it uses less digits than its factorization.

20885338068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248634991 (or 248634989 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 20885338068 in words is "twenty billion, eight hundred eighty-five million, three hundred thirty-eight thousand, sixty-eight".