20825278308690 has 32 divisors (see below), whose sum is σ = 49980803279616. Its totient is φ = 5553392511360.

The previous prime is 20825278308689. The next prime is 20825278308713. The reversal of 20825278308690 is 9680387252802.

It is a happy number.

It is a super-3 number, since 3×20825278308690³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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, 14460910 + ... + 15835670.

It is an arithmetic number, because the mean of its divisors is an integer number (1561900102488).

Almost surely, 2^{20825278308690} is an apocalyptic number.

20825278308690 is an abundant number, since it is smaller than the sum of its proper divisors (29155524970926).

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

20825278308690 is a wasteful number, since it uses less digits than its factorization.

20825278308690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879714.

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 20825278308690 in words is "twenty trillion, eight hundred twenty-five billion, two hundred seventy-eight million, three hundred eight thousand, six hundred ninety".