21242063193 has 16 divisors (see below), whose sum is σ = 32295626496. Its totient is φ = 12303095040.

The previous prime is 21242063179. The next prime is 21242063201. The reversal of 21242063193 is 39136024212.

It is not a de Polignac number, because 21242063193 - 2¹³ = 21242055001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21242063113) 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, 16018993 + ... + 16020318.

It is an arithmetic number, because the mean of its divisors is an integer number (2018476656).

Almost surely, 2^21242063193 is an apocalyptic number.

It is an amenable number.

21242063193 is a deficient number, since it is larger than the sum of its proper divisors (11053563303).

21242063193 is a wasteful number, since it uses less digits than its factorization.

21242063193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32039344.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 21242063193 in words is "twenty-one billion, two hundred forty-two million, sixty-three thousand, one hundred ninety-three".