21035233355 has 16 divisors (see below), whose sum is σ = 26577465600. Its totient is φ = 15938506080.

The previous prime is 21035233321. The next prime is 21035233391. The reversal of 21035233355 is 55333253012.

It is not a de Polignac number, because 21035233355 - 2⁸ = 21035233099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386690 + ... + 437720.

It is an arithmetic number, because the mean of its divisors is an integer number (1661091600).

Almost surely, 2^21035233355 is an apocalyptic number.

21035233355 is a deficient number, since it is larger than the sum of its proper divisors (5542232245).

21035233355 is a wasteful number, since it uses less digits than its factorization.

21035233355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55394.

The product of its (nonzero) digits is 40500, while the sum is 32.

Adding to 21035233355 its reverse (55333253012), we get a palindrome (76368486367).

The spelling of 21035233355 in words is "twenty-one billion, thirty-five million, two hundred thirty-three thousand, three hundred fifty-five".