21353050 has 24 divisors (see below), whose sum is σ = 40373532. Its totient is φ = 8400000.

The previous prime is 21353047. The next prime is 21353051. The reversal of 21353050 is 5035312.

It can be written as a sum of positive squares in 6 ways, for example, as 1896129 + 19456921 = 1377^2 + 4411^2 .

It is not an unprimeable number, because it can be changed into a prime (21353051) 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, 451 + ... + 6550.

Almost surely, 2^21353050 is an apocalyptic number.

21353050 is a deficient number, since it is larger than the sum of its proper divisors (19020482).

21353050 is a wasteful number, since it uses less digits than its factorization.

21353050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7074 (or 7069 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 21353050 is about 4620.9360523600. The cubic root of 21353050 is about 277.4299257633.

Adding to 21353050 its reverse (5035312), we get a palindrome (26388362).

The spelling of 21353050 in words is "twenty-one million, three hundred fifty-three thousand, fifty".