20463543907 has 4 divisors (see below), whose sum is σ = 20962654776. Its totient is φ = 19964433040.

The previous prime is 20463543899. The next prime is 20463543911. The reversal of 20463543907 is 70934536402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20463543907 - 2³ = 20463543899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20463513907) 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, 249555373 + ... + 249555454.

It is an arithmetic number, because the mean of its divisors is an integer number (5240663694).

Almost surely, 2^20463543907 is an apocalyptic number.

20463543907 is a deficient number, since it is larger than the sum of its proper divisors (499110869).

20463543907 is an equidigital number, since it uses as much as digits as its factorization.

20463543907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499110868.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 20463543907 in words is "twenty billion, four hundred sixty-three million, five hundred forty-three thousand, nine hundred seven".