20317734463 has 4 divisors (see below), whose sum is σ = 21880637128. Its totient is φ = 18754831800.

The previous prime is 20317734461. The next prime is 20317734487. The reversal of 20317734463 is 36443771302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36443771302 = 2 ⋅18221885651.

It is a cyclic number.

It is not a de Polignac number, because 20317734463 - 2¹ = 20317734461 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 (20317734461) 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, 781451313 + ... + 781451338.

It is an arithmetic number, because the mean of its divisors is an integer number (5470159282).

Almost surely, 2^20317734463 is an apocalyptic number.

20317734463 is a deficient number, since it is larger than the sum of its proper divisors (1562902665).

20317734463 is a wasteful number, since it uses less digits than its factorization.

20317734463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562902664.

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 20317734463 in words is "twenty billion, three hundred seventeen million, seven hundred thirty-four thousand, four hundred sixty-three".