21453263001 has 12 divisors (see below), whose sum is σ = 31013276580. Its totient is φ = 14290530720.

The previous prime is 21453262973. The next prime is 21453263053. The reversal of 21453263001 is 10036235412.

21453263001 is a `hidden beast` number, since 21 + 4 + 5 + 3 + 2 + 630 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20894413401 + 558849600 = 144549^2 + 23640^2 .

It is not a de Polignac number, because 21453263001 - 2¹¹ = 21453260953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21453263401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 958710 + ... + 980831.

It is an arithmetic number, because the mean of its divisors is an integer number (2584439715).

Almost surely, 2^21453263001 is an apocalyptic number.

It is an amenable number.

21453263001 is a deficient number, since it is larger than the sum of its proper divisors (9560013579).

21453263001 is a wasteful number, since it uses less digits than its factorization.

21453263001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940776 (or 1940773 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21453263001 its reverse (10036235412), we get a palindrome (31489498413).

The spelling of 21453263001 in words is "twenty-one billion, four hundred fifty-three million, two hundred sixty-three thousand, one".