20378724 has 12 divisors (see below), whose sum is σ = 47550384. Its totient is φ = 6792904.

The previous prime is 20378723. The next prime is 20378731. The reversal of 20378724 is 42787302.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20378723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849102 + ... + 849125.

It is an arithmetic number, because the mean of its divisors is an integer number (3962532).

Almost surely, 2^20378724 is an apocalyptic number.

It is an amenable number.

20378724 is an abundant number, since it is smaller than the sum of its proper divisors (27171660).

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

20378724 is a wasteful number, since it uses less digits than its factorization.

20378724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698234 (or 1698232 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 20378724 is about 4514.2800090380. The cubic root of 20378724 is about 273.1444176788.

The spelling of 20378724 in words is "twenty million, three hundred seventy-eight thousand, seven hundred twenty-four".