21003350626 has 4 divisors (see below), whose sum is σ = 31505025942. Its totient is φ = 10501675312.

The previous prime is 21003350579. The next prime is 21003350629. The reversal of 21003350626 is 62605330012.

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

It can be written as a sum of positive squares in only one way, i.e., 19195825401 + 1807525225 = 138549^2 + 42515^2 .

It is a super-2 number, since 2×21003350626² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003350594 and 21003350603.

It is not an unprimeable number, because it can be changed into a prime (21003350629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250837655 + ... + 5250837658.

Almost surely, 2^21003350626 is an apocalyptic number.

21003350626 is a deficient number, since it is larger than the sum of its proper divisors (10501675316).

21003350626 is a wasteful number, since it uses less digits than its factorization.

21003350626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501675315.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 21003350626 its reverse (62605330012), we get a palindrome (83608680638).

The spelling of 21003350626 in words is "twenty-one billion, three million, three hundred fifty thousand, six hundred twenty-six".