2013861944 has 32 divisors (see below), whose sum is σ = 3871627200. Its totient is φ = 981473280.

The previous prime is 2013861943. The next prime is 2013861961. The reversal of 2013861944 is 4491683102.

It is a junction number, because it is equal to n+sod(n) for n = 2013861898 and 2013861907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013861943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485672 + ... + 489800.

It is an arithmetic number, because the mean of its divisors is an integer number (120988350).

Almost surely, 2^2013861944 is an apocalyptic number.

It is an amenable number.

2013861944 is a deficient number, since it is larger than the sum of its proper divisors (1857765256).

2013861944 is a wasteful number, since it uses less digits than its factorization.

2013861944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663 (or 5659 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 2013861944 is about 44876.0731793681. The cubic root of 2013861944 is about 1262.8251765594.

The spelling of 2013861944 in words is "two billion, thirteen million, eight hundred sixty-one thousand, nine hundred forty-four".