21000250334 has 16 divisors (see below), whose sum is σ = 36216004608. Its totient is φ = 8946213432.

The previous prime is 21000250223. The next prime is 21000250357. The reversal of 21000250334 is 43305200012.

It is a happy number.

It is a super-2 number, since 2×21000250334² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 4488734 + ... + 4493409.

It is an arithmetic number, because the mean of its divisors is an integer number (2263500288).

Almost surely, 2^21000250334 is an apocalyptic number.

21000250334 is a deficient number, since it is larger than the sum of its proper divisors (15215754274).

21000250334 is a wasteful number, since it uses less digits than its factorization.

21000250334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8982319.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21000250334 its reverse (43305200012), we get a palindrome (64305450346).

The spelling of 21000250334 in words is "twenty-one billion, two hundred fifty thousand, three hundred thirty-four".