21146004503 has 12 divisors (see below), whose sum is σ = 22909128768. Its totient is φ = 19509684480.

The previous prime is 21146004493. The next prime is 21146004553. The reversal of 21146004503 is 30540064112.

It is not a de Polignac number, because 21146004503 - 2¹⁰ = 21146003479 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 (21146004553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321626 + ... + 381752.

It is an arithmetic number, because the mean of its divisors is an integer number (1909094064).

Almost surely, 2^21146004503 is an apocalyptic number.

21146004503 is a deficient number, since it is larger than the sum of its proper divisors (1763124265).

21146004503 is a wasteful number, since it uses less digits than its factorization.

21146004503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62234 (or 62221 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21146004503 its reverse (30540064112), we get a palindrome (51686068615).

The spelling of 21146004503 in words is "twenty-one billion, one hundred forty-six million, four thousand, five hundred three".