20004856463 has 4 divisors (see below), whose sum is σ = 20006391240. Its totient is φ = 20003321688.

The previous prime is 20004856457. The next prime is 20004856499. The reversal of 20004856463 is 36465840002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36465840002 = 2 ⋅18232920001.

It is a cyclic number.

It is not a de Polignac number, because 20004856463 - 2⁴ = 20004856447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004858463) 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, 747668 + ... + 773961.

It is an arithmetic number, because the mean of its divisors is an integer number (5001597810).

Almost surely, 2^20004856463 is an apocalyptic number.

20004856463 is a deficient number, since it is larger than the sum of its proper divisors (1534777).

20004856463 is a wasteful number, since it uses less digits than its factorization.

20004856463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534776.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 20004856463 in words is "twenty billion, four million, eight hundred fifty-six thousand, four hundred sixty-three".