20473246646 has 8 divisors (see below), whose sum is σ = 30719977704. Its totient is φ = 10233254080.

The previous prime is 20473246637. The next prime is 20473246687. The reversal of 20473246646 is 64664237402.

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 = 20473246597 and 20473246606.

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, 1677020 + ... + 1689183.

It is an arithmetic number, because the mean of its divisors is an integer number (3839997213).

Almost surely, 2^20473246646 is an apocalyptic number.

20473246646 is a deficient number, since it is larger than the sum of its proper divisors (10246731058).

20473246646 is a wasteful number, since it uses less digits than its factorization.

20473246646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369246.

The product of its (nonzero) digits is 1161216, while the sum is 44.

The spelling of 20473246646 in words is "twenty billion, four hundred seventy-three million, two hundred forty-six thousand, six hundred forty-six".