21102433445 has 8 divisors (see below), whose sum is σ = 25383072120. Its totient is φ = 16841845440.

The previous prime is 21102433409. The next prime is 21102433447. The reversal of 21102433445 is 54433420112.

It can be written as a sum of positive squares in 4 ways, for example, as 852289636 + 20250143809 = 29194^2 + 142303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21102433445 - 2⁶ = 21102433381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102433447) 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, 5010350 + ... + 5014559.

It is an arithmetic number, because the mean of its divisors is an integer number (3172884015).

Almost surely, 2^21102433445 is an apocalyptic number.

It is an amenable number.

21102433445 is a deficient number, since it is larger than the sum of its proper divisors (4280638675).

21102433445 is a wasteful number, since it uses less digits than its factorization.

21102433445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025335.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21102433445 its reverse (54433420112), we get a palindrome (75535853557).

The spelling of 21102433445 in words is "twenty-one billion, one hundred two million, four hundred thirty-three thousand, four hundred forty-five".