20681467734 has 8 divisors (see below), whose sum is σ = 41362935480. Its totient is φ = 6893822576.

The previous prime is 20681467693. The next prime is 20681467771. The reversal of 20681467734 is 43776418602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20681467734 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1723455639 + ... + 1723455650.

It is an arithmetic number, because the mean of its divisors is an integer number (5170366935).

Almost surely, 2^20681467734 is an apocalyptic number.

20681467734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20681467734 is a wasteful number, since it uses less digits than its factorization.

20681467734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446911294.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 20681467734 in words is "twenty billion, six hundred eighty-one million, four hundred sixty-seven thousand, seven hundred thirty-four".