21301024634 has 16 divisors (see below), whose sum is σ = 32709937320. Its totient is φ = 10400601600.

The previous prime is 21301024631. The next prime is 21301024643. The reversal of 21301024634 is 43642010312.

It can be written as a sum of positive squares in 4 ways, for example, as 19503519025 + 1797505609 = 139655^2 + 42397^2 .

It is not an unprimeable number, because it can be changed into a prime (21301024631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707519 + ... + 737010.

Almost surely, 2^21301024634 is an apocalyptic number.

21301024634 is a deficient number, since it is larger than the sum of its proper divisors (11408912686).

21301024634 is a wasteful number, since it uses less digits than its factorization.

21301024634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444705.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21301024634 its reverse (43642010312), we get a palindrome (64943034946).

The spelling of 21301024634 in words is "twenty-one billion, three hundred one million, twenty-four thousand, six hundred thirty-four".