20461316644 has 12 divisors (see below), whose sum is σ = 35808562944. Its totient is φ = 10230298664.

The previous prime is 20461316633. The next prime is 20461316669. The reversal of 20461316644 is 44661316402.

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, 69489 + ... + 213895.

It is an arithmetic number, because the mean of its divisors is an integer number (2984046912).

Almost surely, 2^20461316644 is an apocalyptic number.

It is an amenable number.

20461316644 is a deficient number, since it is larger than the sum of its proper divisors (15347246300).

20461316644 is a wasteful number, since it uses less digits than its factorization.

20461316644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179834 (or 179832 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 20461316644 in words is "twenty billion, four hundred sixty-one million, three hundred sixteen thousand, six hundred forty-four".