20381734 has 4 divisors (see below), whose sum is σ = 30572604. Its totient is φ = 10190866.

The previous prime is 20381731. The next prime is 20381741. The reversal of 20381734 is 43718302.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095432 + ... + 5095435.

It is an arithmetic number, because the mean of its divisors is an integer number (7643151).

Almost surely, 2^20381734 is an apocalyptic number.

20381734 is a deficient number, since it is larger than the sum of its proper divisors (10190870).

20381734 is a wasteful number, since it uses less digits than its factorization.

20381734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10190869.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20381734 is about 4514.6133832256. The cubic root of 20381734 is about 273.1578651060.

It can be divided in two parts, 20381 and 734, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20381734 in words is "twenty million, three hundred eighty-one thousand, seven hundred thirty-four".