21016414504 has 16 divisors (see below), whose sum is σ = 39408732000. Its totient is φ = 10507419312.

The previous prime is 21016414487. The next prime is 21016414583. The reversal of 21016414504 is 40541461012.

It is a super-4 number, since 4×21016414504⁴ (a number of 42 digits) contains 4444 as substring.

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, 23797 + ... + 206395.

It is an arithmetic number, because the mean of its divisors is an integer number (2463045750).

Almost surely, 2^21016414504 is an apocalyptic number.

It is an amenable number.

21016414504 is a deficient number, since it is larger than the sum of its proper divisors (18392317496).

21016414504 is a wasteful number, since it uses less digits than its factorization.

21016414504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196992 (or 196988 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 21016414504 its reverse (40541461012), we get a palindrome (61557875516).

The spelling of 21016414504 in words is "twenty-one billion, sixteen million, four hundred fourteen thousand, five hundred four".