20209978250106 has 8 divisors (see below), whose sum is σ = 40419956500224. Its totient is φ = 6736659416700.

The previous prime is 20209978250071. The next prime is 20209978250117. The reversal of 20209978250106 is 60105287990202.

It is a sphenic number, since it is the product of 3 distinct primes.

20209978250106 is an admirable number.

It is a super-2 number, since 2×20209978250106² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1684164854170 + ... + 1684164854181.

It is an arithmetic number, because the mean of its divisors is an integer number (5052494562528).

Almost surely, 2^{20209978250106} is an apocalyptic number.

20209978250106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20209978250106 is a wasteful number, since it uses less digits than its factorization.

20209978250106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368329708356.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 20209978250106 in words is "twenty trillion, two hundred nine billion, nine hundred seventy-eight million, two hundred fifty thousand, one hundred six".