21303001232 has 10 divisors (see below), whose sum is σ = 41274564918. Its totient is φ = 10651500608.

The previous prime is 21303001211. The next prime is 21303001249. The reversal of 21303001232 is 23210030312.

It can be written as a sum of positive squares in only one way, i.e., 21279807376 + 23193856 = 145876^2 + 4816^2 .

It is a super-2 number, since 2×21303001232² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21303001232.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665718773 + ... + 665718804.

Almost surely, 2^21303001232 is an apocalyptic number.

It is an amenable number.

21303001232 is a deficient number, since it is larger than the sum of its proper divisors (19971563686).

21303001232 is a wasteful number, since it uses less digits than its factorization.

21303001232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331437585 (or 1331437579 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21303001232 its reverse (23210030312), we get a palindrome (44513031544).

The spelling of 21303001232 in words is "twenty-one billion, three hundred three million, one thousand, two hundred thirty-two".