20311011378 has 48 divisors (see below), whose sum is σ = 50438980800. Its totient is φ = 5786409888.

The previous prime is 20311011377. The next prime is 20311011389. The reversal of 20311011378 is 87311011302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20311011377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188553 + ... + 275996.

It is an arithmetic number, because the mean of its divisors is an integer number (1050812100).

Almost surely, 2^20311011378 is an apocalyptic number.

20311011378 is an abundant number, since it is smaller than the sum of its proper divisors (30127969422).

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

20311011378 is a wasteful number, since it uses less digits than its factorization.

20311011378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464911 (or 464908 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The spelling of 20311011378 in words is "twenty billion, three hundred eleven million, eleven thousand, three hundred seventy-eight".