21700003834 has 4 divisors (see below), whose sum is σ = 32550005754. Its totient is φ = 10850001916.

The previous prime is 21700003811. The next prime is 21700003841. The reversal of 21700003834 is 43830000712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16932515625 + 4767488209 = 130125^2 + 69047^2 .

It is a super-2 number, since 2×21700003834² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5425000957 + ... + 5425000960.

Almost surely, 2^21700003834 is an apocalyptic number.

21700003834 is a deficient number, since it is larger than the sum of its proper divisors (10850001920).

21700003834 is a wasteful number, since it uses less digits than its factorization.

21700003834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10850001919.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 21700003834 in words is "twenty-one billion, seven hundred million, three thousand, eight hundred thirty-four".