20247378 has 16 divisors (see below), whose sum is σ = 41259456. Its totient is φ = 6621680.

The previous prime is 20247377. The next prime is 20247379. The reversal of 20247378 is 87374202.

It is an interprime number because it is at equal distance from previous prime (20247377) and next prime (20247379).

It is not an unprimeable number, because it can be changed into a prime (20247373) 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 7 ways as a sum of consecutive naturals, for example, 31518 + ... + 32153.

It is an arithmetic number, because the mean of its divisors is an integer number (2578716).

Almost surely, 2^20247378 is an apocalyptic number.

20247378 is an abundant number, since it is smaller than the sum of its proper divisors (21012078).

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

20247378 is a wasteful number, since it uses less digits than its factorization.

20247378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63729.

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

The square root of 20247378 is about 4499.7086572355. The cubic root of 20247378 is about 272.5563242437.

The spelling of 20247378 in words is "twenty million, two hundred forty-seven thousand, three hundred seventy-eight".