20407878870 has 64 divisors (see below), whose sum is σ = 49368657600. Its totient is φ = 5398888448.

The previous prime is 20407878847. The next prime is 20407878937. The reversal of 20407878870 is 7887870402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4364854 + ... + 4369526.

It is an arithmetic number, because the mean of its divisors is an integer number (771385275).

Almost surely, 2^20407878870 is an apocalyptic number.

20407878870 is an abundant number, since it is smaller than the sum of its proper divisors (28960778730).

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

20407878870 is a wasteful number, since it uses less digits than its factorization.

20407878870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5809.

The product of its (nonzero) digits is 1404928, while the sum is 51.

The spelling of 20407878870 in words is "twenty billion, four hundred seven million, eight hundred seventy-eight thousand, eight hundred seventy".