20842102378 has 8 divisors (see below), whose sum is σ = 31421850372. Its totient is φ = 10368152256.

The previous prime is 20842102313. The next prime is 20842102387. The reversal of 20842102378 is 87320124802.

It can be written as a sum of positive squares in 2 ways, for example, as 13862001169 + 6980101209 = 117737^2 + 83547^2 .

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

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, 26448975 + ... + 26449762.

Almost surely, 2^20842102378 is an apocalyptic number.

20842102378 is a deficient number, since it is larger than the sum of its proper divisors (10579747994).

20842102378 is a wasteful number, since it uses less digits than its factorization.

20842102378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52898936.

The product of its (nonzero) digits is 43008, while the sum is 37.

The spelling of 20842102378 in words is "twenty billion, eight hundred forty-two million, one hundred two thousand, three hundred seventy-eight".