21202100433 has 16 divisors (see below), whose sum is σ = 31414681600. Its totient is φ = 14132860560.

The previous prime is 21202100431. The next prime is 21202100449. The reversal of 21202100433 is 33400120212.

21202100433 is a `hidden beast` number, since 2 + 1 + 20 + 210 + 0 + 433 = 666.

It is not a de Polignac number, because 21202100433 - 2¹ = 21202100431 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202100431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173223 + ... + 269091.

It is an arithmetic number, because the mean of its divisors is an integer number (1963417600).

Almost surely, 2^21202100433 is an apocalyptic number.

It is an amenable number.

21202100433 is a deficient number, since it is larger than the sum of its proper divisors (10212581167).

21202100433 is an equidigital number, since it uses as much as digits as its factorization.

21202100433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104069 (or 104063 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21202100433 its reverse (33400120212), we get a palindrome (54602220645).

The spelling of 21202100433 in words is "twenty-one billion, two hundred two million, one hundred thousand, four hundred thirty-three".