21010000193 has 16 divisors (see below), whose sum is σ = 25861979136. Its totient is φ = 16621035840.

The previous prime is 21010000147. The next prime is 21010000199. The reversal of 21010000193 is 39100001012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21010000193 - 2⁶ = 21010000129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010000199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058783 + ... + 1078443.

It is an arithmetic number, because the mean of its divisors is an integer number (1616373696).

Almost surely, 2^21010000193 is an apocalyptic number.

It is an amenable number.

21010000193 is a deficient number, since it is larger than the sum of its proper divisors (4851978943).

21010000193 is a wasteful number, since it uses less digits than its factorization.

21010000193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31424.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 21010000193 in words is "twenty-one billion, ten million, one hundred ninety-three", and thus it is an aban number.