13220109978 has 32 divisors (see below), whose sum is σ = 28107397440. Its totient is φ = 4133433600.

The previous prime is 13220109971. The next prime is 13220109983. The reversal of 13220109978 is 87990102231.

It is not an unprimeable number, because it can be changed into a prime (13220109971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562575 + ... + 585602.

It is an arithmetic number, because the mean of its divisors is an integer number (878356170).

Almost surely, 2^13220109978 is an apocalyptic number.

13220109978 is an abundant number, since it is smaller than the sum of its proper divisors (14887287462).

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

13220109978 is a wasteful number, since it uses less digits than its factorization.

13220109978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148302.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 13220109978 in words is "thirteen billion, two hundred twenty million, one hundred nine thousand, nine hundred seventy-eight".