21301050445 has 32 divisors (see below), whose sum is σ = 26252328960. Its totient is φ = 16587305280.

The previous prime is 21301050443. The next prime is 21301050487. The reversal of 21301050445 is 54405010312.

It is a happy number.

It is not a de Polignac number, because 21301050445 - 2¹ = 21301050443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301050443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16051372 + ... + 16052698.

It is an arithmetic number, because the mean of its divisors is an integer number (820385280).

Almost surely, 2^21301050445 is an apocalyptic number.

It is an amenable number.

21301050445 is a deficient number, since it is larger than the sum of its proper divisors (4951278515).

21301050445 is a wasteful number, since it uses less digits than its factorization.

21301050445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21301050445 its reverse (54405010312), we get a palindrome (75706060757).

The spelling of 21301050445 in words is "twenty-one billion, three hundred one million, fifty thousand, four hundred forty-five".