20338718871700 has 36 divisors (see below), whose sum is σ = 44135300520220. Its totient is φ = 8135435831040.

The previous prime is 20338718871697. The next prime is 20338718871701. The reversal of 20338718871700 is 717881783302.

It can be written as a sum of positive squares in 6 ways, for example, as 773277527044 + 19565441344656 = 879362^2 + 4423284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338718871701) 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, 17774074 + ... + 18883726.

Almost surely, 2^{20338718871700} is an apocalyptic number.

20338718871700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20338718871700 is an abundant number, since it is smaller than the sum of its proper divisors (23796581648520).

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

20338718871700 is a wasteful number, since it uses less digits than its factorization.

20338718871700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292956 (or 1292949 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 20338718871700 in words is "twenty trillion, three hundred thirty-eight billion, seven hundred eighteen million, eight hundred seventy-one thousand, seven hundred".