20435674463 has 4 divisors (see below), whose sum is σ = 20490462168. Its totient is φ = 20380886760.

The previous prime is 20435674421. The next prime is 20435674507. The reversal of 20435674463 is 36447653402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36447653402 = 2 ⋅18223826701.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20435674463 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 (20435671463) 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, 27393293 + ... + 27394038.

It is an arithmetic number, because the mean of its divisors is an integer number (5122615542).

Almost surely, 2^20435674463 is an apocalyptic number.

20435674463 is a deficient number, since it is larger than the sum of its proper divisors (54787705).

20435674463 is an equidigital number, since it uses as much as digits as its factorization.

20435674463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54787704.

The product of its (nonzero) digits is 1451520, while the sum is 44.

The spelling of 20435674463 in words is "twenty billion, four hundred thirty-five million, six hundred seventy-four thousand, four hundred sixty-three".