21010140395 has 16 divisors (see below), whose sum is σ = 26701021440. Its totient is φ = 15837358944.

The previous prime is 21010140367. The next prime is 21010140419. The reversal of 21010140395 is 59304101012.

It is a cyclic number.

It is not a de Polignac number, because 21010140395 - 2⁶ = 21010140331 is a prime.

It is a super-2 number, since 2×21010140395² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1355705 + ... + 1371114.

It is an arithmetic number, because the mean of its divisors is an integer number (1668813840).

Almost surely, 2^21010140395 is an apocalyptic number.

21010140395 is a deficient number, since it is larger than the sum of its proper divisors (5690881045).

21010140395 is a wasteful number, since it uses less digits than its factorization.

21010140395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726914.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 21010140395 in words is "twenty-one billion, ten million, one hundred forty thousand, three hundred ninety-five".