21073075463 has 4 divisors (see below), whose sum is σ = 22988809608. Its totient is φ = 19157341320.

The previous prime is 21073075459. The next prime is 21073075469. The reversal of 21073075463 is 36457037012.

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 21073075463 - 2² = 21073075459 is a prime.

It is a super-3 number, since 3×21073075463³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073075469) 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, 957867056 + ... + 957867077.

It is an arithmetic number, because the mean of its divisors is an integer number (5747202402).

Almost surely, 2^21073075463 is an apocalyptic number.

21073075463 is a deficient number, since it is larger than the sum of its proper divisors (1915734145).

21073075463 is a wasteful number, since it uses less digits than its factorization.

21073075463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915734144.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 21073075463 in words is "twenty-one billion, seventy-three million, seventy-five thousand, four hundred sixty-three".