21010010434 has 16 divisors (see below), whose sum is σ = 36040124736. Its totient is φ = 8998549200.

The previous prime is 21010010419. The next prime is 21010010443. The reversal of 21010010434 is 43401001012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455637 + ... + 499624.

It is an arithmetic number, because the mean of its divisors is an integer number (2252507796).

Almost surely, 2^21010010434 is an apocalyptic number.

21010010434 is a deficient number, since it is larger than the sum of its proper divisors (15030114302).

21010010434 is a wasteful number, since it uses less digits than its factorization.

21010010434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956841.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21010010434 its reverse (43401001012), we get a palindrome (64411011446).

The spelling of 21010010434 in words is "twenty-one billion, ten million, ten thousand, four hundred thirty-four".