21035442345 has 8 divisors (see below), whose sum is σ = 33656707776. Its totient is φ = 11218902576.

The previous prime is 21035442331. The next prime is 21035442359. The reversal of 21035442345 is 54324453012.

It is an interprime number because it is at equal distance from previous prime (21035442331) and next prime (21035442359).

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

It is not a de Polignac number, because 21035442345 - 2⁷ = 21035442217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701181397 + ... + 701181426.

It is an arithmetic number, because the mean of its divisors is an integer number (4207088472).

Almost surely, 2^21035442345 is an apocalyptic number.

It is an amenable number.

21035442345 is a deficient number, since it is larger than the sum of its proper divisors (12621265431).

21035442345 is a wasteful number, since it uses less digits than its factorization.

21035442345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402362831.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 21035442345 its reverse (54324453012), we get a palindrome (75359895357).

The spelling of 21035442345 in words is "twenty-one billion, thirty-five million, four hundred forty-two thousand, three hundred forty-five".