21900711293 has 4 divisors (see below), whose sum is σ = 21921954528. Its totient is φ = 21879468060.

The previous prime is 21900711269. The next prime is 21900711319. The reversal of 21900711293 is 39211700912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21900711293 - 2²⁴ = 21883934077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21900711593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10620071 + ... + 10622132.

It is an arithmetic number, because the mean of its divisors is an integer number (5480488632).

Almost surely, 2^21900711293 is an apocalyptic number.

It is an amenable number.

21900711293 is a deficient number, since it is larger than the sum of its proper divisors (21243235).

21900711293 is a wasteful number, since it uses less digits than its factorization.

21900711293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21243234.

The product of its (nonzero) digits is 6804, while the sum is 35.

The spelling of 21900711293 in words is "twenty-one billion, nine hundred million, seven hundred eleven thousand, two hundred ninety-three".