21035202545553 has 8 divisors (see below), whose sum is σ = 32053641974208. Its totient is φ = 12020115740304.

The previous prime is 21035202545503. The next prime is 21035202545597. The reversal of 21035202545553 is 35554520253012.

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

It is not a de Polignac number, because 21035202545553 - 2¹⁷ = 21035202414481 is a prime.

It is a super-2 number, since 2×21035202545553² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21035202545503) 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, 500838155826 + ... + 500838155867.

It is an arithmetic number, because the mean of its divisors is an integer number (4006705246776).

Almost surely, 2^{21035202545553} is an apocalyptic number.

It is an amenable number.

21035202545553 is a deficient number, since it is larger than the sum of its proper divisors (11018439428655).

21035202545553 is a wasteful number, since it uses less digits than its factorization.

21035202545553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001676311703.

The product of its (nonzero) digits is 900000, while the sum is 42.

Adding to 21035202545553 its reverse (35554520253012), we get a palindrome (56589722798565).

The spelling of 21035202545553 in words is "twenty-one trillion, thirty-five billion, two hundred two million, five hundred forty-five thousand, five hundred fifty-three".