20640748414 has 48 divisors (see below), whose sum is σ = 37753772544. Its totient is φ = 8381037600.

The previous prime is 20640748319. The next prime is 20640748421. The reversal of 20640748414 is 41484704602.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25717 + ... + 204799.

It is an arithmetic number, because the mean of its divisors is an integer number (786536928).

Almost surely, 2^20640748414 is an apocalyptic number.

20640748414 is a deficient number, since it is larger than the sum of its proper divisors (17113024130).

20640748414 is a wasteful number, since it uses less digits than its factorization.

20640748414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179153 (or 179140 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 40.

The spelling of 20640748414 in words is "twenty billion, six hundred forty million, seven hundred forty-eight thousand, four hundred fourteen".