21411040293 has 24 divisors (see below), whose sum is σ = 31153707000. Its totient is φ = 14169538944.

The previous prime is 21411040271. The next prime is 21411040361. The reversal of 21411040293 is 39204011412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7935489 + 21403104804 = 2817^2 + 146298^2 .

It is not a de Polignac number, because 21411040293 - 2⁶ = 21411040229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411040253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2770671 + ... + 2778387.

It is an arithmetic number, because the mean of its divisors is an integer number (1298071125).

Almost surely, 2^21411040293 is an apocalyptic number.

It is an amenable number.

21411040293 is a deficient number, since it is larger than the sum of its proper divisors (9742666707).

21411040293 is a wasteful number, since it uses less digits than its factorization.

21411040293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9941 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21411040293 in words is "twenty-one billion, four hundred eleven million, forty thousand, two hundred ninety-three".