21503413046 has 48 divisors (see below), whose sum is σ = 34312605936. Its totient is φ = 10104196608.

The previous prime is 21503413037. The next prime is 21503413079. The reversal of 21503413046 is 64031430512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33442001 + ... + 33442643.

It is an arithmetic number, because the mean of its divisors is an integer number (714845957).

Almost surely, 2^21503413046 is an apocalyptic number.

21503413046 is a deficient number, since it is larger than the sum of its proper divisors (12809192890).

21503413046 is a wasteful number, since it uses less digits than its factorization.

21503413046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 21503413046 its reverse (64031430512), we get a palindrome (85534843558).

The spelling of 21503413046 in words is "twenty-one billion, five hundred three million, four hundred thirteen thousand, forty-six".