21463150013 has 4 divisors (see below), whose sum is σ = 21464939868. Its totient is φ = 21461360160.

The previous prime is 21463149973. The next prime is 21463150043. The reversal of 21463150013 is 31005136412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4364187844 + 17098962169 = 66062^2 + 130763^2 .

It is a cyclic number.

It is not a de Polignac number, because 21463150013 - 2¹² = 21463145917 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 (21463150043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876818 + ... + 900963.

It is an arithmetic number, because the mean of its divisors is an integer number (5366234967).

Almost surely, 2^21463150013 is an apocalyptic number.

It is an amenable number.

21463150013 is a deficient number, since it is larger than the sum of its proper divisors (1789855).

21463150013 is a wasteful number, since it uses less digits than its factorization.

21463150013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789854.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 21463150013 its reverse (31005136412), we get a palindrome (52468286425).

The spelling of 21463150013 in words is "twenty-one billion, four hundred sixty-three million, one hundred fifty thousand, thirteen".