20315496646 has 8 divisors (see below), whose sum is σ = 30559572504. Its totient is φ = 10128972480.

The previous prime is 20315496629. The next prime is 20315496647. The reversal of 20315496646 is 64669451302.

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

It is a junction number, because it is equal to n+sod(n) for n = 20315496596 and 20315496605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315496647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14387040 + ... + 14388451.

It is an arithmetic number, because the mean of its divisors is an integer number (3819946563).

Almost surely, 2^20315496646 is an apocalyptic number.

20315496646 is a deficient number, since it is larger than the sum of its proper divisors (10244075858).

20315496646 is a wasteful number, since it uses less digits than its factorization.

20315496646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28775846.

The product of its (nonzero) digits is 933120, while the sum is 46.

It can be divided in two parts, 20315 and 496646, that added together give a square (516961 = 719²).

The spelling of 20315496646 in words is "twenty billion, three hundred fifteen million, four hundred ninety-six thousand, six hundred forty-six".