20386702187 has 16 divisors (see below), whose sum is σ = 21511526400. Its totient is φ = 19297149408.

The previous prime is 20386702181. The next prime is 20386702241. The reversal of 20386702187 is 78120768302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20386702187 - 2¹⁶ = 20386636651 is a prime.

It is a super-2 number, since 2×20386702187² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20386702181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255314 + ... + 325512.

It is an arithmetic number, because the mean of its divisors is an integer number (1344470400).

Almost surely, 2^20386702187 is an apocalyptic number.

20386702187 is a deficient number, since it is larger than the sum of its proper divisors (1124824213).

20386702187 is a wasteful number, since it uses less digits than its factorization.

20386702187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70450.

The product of its (nonzero) digits is 225792, while the sum is 44.

The spelling of 20386702187 in words is "twenty billion, three hundred eighty-six million, seven hundred two thousand, one hundred eighty-seven".