21033300454 has 4 divisors (see below), whose sum is σ = 31549950684. Its totient is φ = 10516650226.

The previous prime is 21033300451. The next prime is 21033300479. The reversal of 21033300454 is 45400333012.

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

It is a super-3 number, since 3×21033300454³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033300451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258325112 + ... + 5258325115.

It is an arithmetic number, because the mean of its divisors is an integer number (7887487671).

Almost surely, 2^21033300454 is an apocalyptic number.

21033300454 is a deficient number, since it is larger than the sum of its proper divisors (10516650230).

21033300454 is a wasteful number, since it uses less digits than its factorization.

21033300454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516650229.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21033300454 its reverse (45400333012), we get a palindrome (66433633466).

The spelling of 21033300454 in words is "twenty-one billion, thirty-three million, three hundred thousand, four hundred fifty-four".