20730378 has 32 divisors (see below), whose sum is σ = 44198784. Its totient is φ = 6459392.

The previous prime is 20730373. The next prime is 20730407. The reversal of 20730378 is 87303702.

It is not an unprimeable number, because it can be changed into a prime (20730373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16426 + ... + 17642.

It is an arithmetic number, because the mean of its divisors is an integer number (1381212).

Almost surely, 2^20730378 is an apocalyptic number.

20730378 is an abundant number, since it is smaller than the sum of its proper divisors (23468406).

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

20730378 is a wasteful number, since it uses less digits than its factorization.

20730378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 20730378 is about 4553.0624858440. The cubic root of 20730378 is about 274.7065873287.

The spelling of 20730378 in words is "twenty million, seven hundred thirty thousand, three hundred seventy-eight".