21214030293 has 12 divisors (see below), whose sum is σ = 31389866508. Its totient is φ = 13797743040.

The previous prime is 21214030283. The next prime is 21214030333. The reversal of 21214030293 is 39203041212.

It is a happy number.

21214030293 is a `hidden beast` number, since 212 + 140 + 302 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7348261284 + 13865769009 = 85722^2 + 117753^2 .

It is not a de Polignac number, because 21214030293 - 2¹⁷ = 21213899221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214030283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28744930 + ... + 28745667.

It is an arithmetic number, because the mean of its divisors is an integer number (2615822209).

Almost surely, 2^21214030293 is an apocalyptic number.

It is an amenable number.

21214030293 is a deficient number, since it is larger than the sum of its proper divisors (10175836215).

21214030293 is a wasteful number, since it uses less digits than its factorization.

21214030293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57490644 (or 57490641 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 21214030293 in words is "twenty-one billion, two hundred fourteen million, thirty thousand, two hundred ninety-three".