21463152404 has 6 divisors (see below), whose sum is σ = 37560516714. Its totient is φ = 10731576200.

The previous prime is 21463152253. The next prime is 21463152407. The reversal of 21463152404 is 40425136412.

It can be written as a sum of positive squares in only one way, i.e., 21461664004 + 1488400 = 146498^2 + 1220^2 .

It is a super-2 number, since 2×21463152404² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21463152407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2682894047 + ... + 2682894054.

It is an arithmetic number, because the mean of its divisors is an integer number (6260086119).

Almost surely, 2^21463152404 is an apocalyptic number.

It is an amenable number.

21463152404 is a deficient number, since it is larger than the sum of its proper divisors (16097364310).

21463152404 is a wasteful number, since it uses less digits than its factorization.

21463152404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5365788105 (or 5365788103 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 21463152404 its reverse (40425136412), we get a palindrome (61888288816).

The spelling of 21463152404 in words is "twenty-one billion, four hundred sixty-three million, one hundred fifty-two thousand, four hundred four".