21124563934 has 16 divisors (see below), whose sum is σ = 32291728272. Its totient is φ = 10360741248.

The previous prime is 21124563893. The next prime is 21124563959. The reversal of 21124563934 is 43936542112.

It is a congruent number.

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, 535657 + ... + 573739.

It is an arithmetic number, because the mean of its divisors is an integer number (2018233017).

Almost surely, 2^21124563934 is an apocalyptic number.

21124563934 is a deficient number, since it is larger than the sum of its proper divisors (11167164338).

21124563934 is a wasteful number, since it uses less digits than its factorization.

21124563934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43371.

The product of its digits is 155520, while the sum is 40.

The spelling of 21124563934 in words is "twenty-one billion, one hundred twenty-four million, five hundred sixty-three thousand, nine hundred thirty-four".