20131612646 has 8 divisors (see below), whose sum is σ = 30474459840. Its totient is φ = 9973459368.

The previous prime is 20131612609. The next prime is 20131612649. The reversal of 20131612646 is 64621613102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131612649) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46173206 + ... + 46173641.

It is an arithmetic number, because the mean of its divisors is an integer number (3809307480).

Almost surely, 2^20131612646 is an apocalyptic number.

20131612646 is a deficient number, since it is larger than the sum of its proper divisors (10342847194).

20131612646 is a wasteful number, since it uses less digits than its factorization.

20131612646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92346958.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 20131612646 in words is "twenty billion, one hundred thirty-one million, six hundred twelve thousand, six hundred forty-six".