21202100434 has 8 divisors (see below), whose sum is σ = 31805301168. Its totient is φ = 10600333380.

The previous prime is 21202100431. The next prime is 21202100449. The reversal of 21202100434 is 43400120212.

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

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 3 ways as a sum of consecutive naturals, for example, 320652 + ... + 381079.

It is an arithmetic number, because the mean of its divisors is an integer number (3975662646).

Almost surely, 2^21202100434 is an apocalyptic number.

21202100434 is a deficient number, since it is larger than the sum of its proper divisors (10603200734).

21202100434 is a wasteful number, since it uses less digits than its factorization.

21202100434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716840.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21202100434 its reverse (43400120212), we get a palindrome (64602220646).

The spelling of 21202100434 in words is "twenty-one billion, two hundred two million, one hundred thousand, four hundred thirty-four".