20738918368 has 36 divisors (see below), whose sum is σ = 47495830032. Its totient is φ = 8888107200.

The previous prime is 20738918353. The next prime is 20738918383. The reversal of 20738918368 is 86381983702.

It is an interprime number because it is at equal distance from previous prime (20738918353) and next prime (20738918383).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6611608 + ... + 6614743.

It is an arithmetic number, because the mean of its divisors is an integer number (1319328612).

Almost surely, 2^20738918368 is an apocalyptic number.

20738918368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20738918368 is an abundant number, since it is smaller than the sum of its proper divisors (26756911664).

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

20738918368 is a wasteful number, since it uses less digits than its factorization.

20738918368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13226375 (or 13226360 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 20738918368 in words is "twenty billion, seven hundred thirty-eight million, nine hundred eighteen thousand, three hundred sixty-eight".