21230312026 has 48 divisors (see below), whose sum is σ = 40570206912. Its totient is φ = 8239257600.

The previous prime is 21230311937. The next prime is 21230312057. The reversal of 21230312026 is 62021303212.

It is a super-2 number, since 2×21230312026² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21230311988 and 21230312006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 238731 + ... + 315361.

It is an arithmetic number, because the mean of its divisors is an integer number (845212644).

Almost surely, 2^21230312026 is an apocalyptic number.

21230312026 is a deficient number, since it is larger than the sum of its proper divisors (19339894886).

21230312026 is a wasteful number, since it uses less digits than its factorization.

21230312026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76915 (or 76908 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21230312026 its reverse (62021303212), we get a palindrome (83251615238).

The spelling of 21230312026 in words is "twenty-one billion, two hundred thirty million, three hundred twelve thousand, twenty-six".