21103153433 has 8 divisors (see below), whose sum is σ = 21254094336. Its totient is φ = 20952360000.

The previous prime is 21103153429. The next prime is 21103153441. The reversal of 21103153433 is 33435130112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103153433 - 2² = 21103153429 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103153483) 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, 258785 + ... + 330417.

It is an arithmetic number, because the mean of its divisors is an integer number (2656761792).

Almost surely, 2^21103153433 is an apocalyptic number.

It is an amenable number.

21103153433 is a deficient number, since it is larger than the sum of its proper divisors (150940903).

21103153433 is a wasteful number, since it uses less digits than its factorization.

21103153433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73735.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 21103153433 its reverse (33435130112), we get a palindrome (54538283545).

The spelling of 21103153433 in words is "twenty-one billion, one hundred three million, one hundred fifty-three thousand, four hundred thirty-three".