21034534003 has 16 divisors (see below), whose sum is σ = 25988619520. Its totient is φ = 16619030496.

The previous prime is 21034533991. The next prime is 21034534021. The reversal of 21034534003 is 30043543012.

It is a cyclic number.

It is not a de Polignac number, because 21034534003 - 2⁹ = 21034533491 is a prime.

It is a super-5 number, since 5×21034534003⁵ (a number of 53 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (21034534063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2132301 + ... + 2142142.

It is an arithmetic number, because the mean of its divisors is an integer number (1624288720).

Almost surely, 2^21034534003 is an apocalyptic number.

21034534003 is a deficient number, since it is larger than the sum of its proper divisors (4954085517).

21034534003 is a wasteful number, since it uses less digits than its factorization.

21034534003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274506.

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

Subtracting 21034534003 from its reverse (30043543012), we obtain a palindrome (9009009009).

The spelling of 21034534003 in words is "twenty-one billion, thirty-four million, five hundred thirty-four thousand, three".