21503316162 has 8 divisors (see below), whose sum is σ = 43006632336. Its totient is φ = 7167772052.

The previous prime is 21503316143. The next prime is 21503316173. The reversal of 21503316162 is 26161330512.

It is a sphenic number, since it is the product of 3 distinct primes.

21503316162 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791943008 + ... + 1791943019.

It is an arithmetic number, because the mean of its divisors is an integer number (5375829042).

Almost surely, 2^21503316162 is an apocalyptic number.

21503316162 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21503316162 is a wasteful number, since it uses less digits than its factorization.

21503316162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583886032.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 21503316162 its reverse (26161330512), we get a palindrome (47664646674).

The spelling of 21503316162 in words is "twenty-one billion, five hundred three million, three hundred sixteen thousand, one hundred sixty-two".