20289372 has 12 divisors (see below), whose sum is σ = 47341896. Its totient is φ = 6763120.

The previous prime is 20289361. The next prime is 20289389. The reversal of 20289372 is 27398202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845379 + ... + 845402.

It is an arithmetic number, because the mean of its divisors is an integer number (3945158).

Almost surely, 2^20289372 is an apocalyptic number.

It is an amenable number.

20289372 is an abundant number, since it is smaller than the sum of its proper divisors (27052524).

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

20289372 is a wasteful number, since it uses less digits than its factorization.

20289372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690788 (or 1690786 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20289372 is about 4504.3725423193. The cubic root of 20289372 is about 272.7446256029.

The spelling of 20289372 in words is "twenty million, two hundred eighty-nine thousand, three hundred seventy-two".