20427149846 has 8 divisors (see below), whose sum is σ = 30652476840. Its totient is φ = 10209657568.

The previous prime is 20427149789. The next prime is 20427149863. The reversal of 20427149846 is 64894172402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20427149846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1952156 + ... + 1962591.

It is an arithmetic number, because the mean of its divisors is an integer number (3831559605).

Almost surely, 2^20427149846 is an apocalyptic number.

20427149846 is a deficient number, since it is larger than the sum of its proper divisors (10225326994).

20427149846 is a wasteful number, since it uses less digits than its factorization.

20427149846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917358.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 20427149846 in words is "twenty billion, four hundred twenty-seven million, one hundred forty-nine thousand, eight hundred forty-six".