21843062493 has 32 divisors (see below), whose sum is σ = 35476070400. Its totient is φ = 11669702400.

The previous prime is 21843062447. The next prime is 21843062509. The reversal of 21843062493 is 39426034812.

It is not a de Polignac number, because 21843062493 - 2⁸ = 21843062237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21843062693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148693 + ... + 256506.

It is an arithmetic number, because the mean of its divisors is an integer number (1108627200).

Almost surely, 2^21843062493 is an apocalyptic number.

It is an amenable number.

21843062493 is a deficient number, since it is larger than the sum of its proper divisors (13633007907).

21843062493 is a wasteful number, since it uses less digits than its factorization.

21843062493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405377.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 21843062493 in words is "twenty-one billion, eight hundred forty-three million, sixty-two thousand, four hundred ninety-three".