21090229741 has 8 divisors (see below), whose sum is σ = 24229315584. Its totient is φ = 17982692880.

The previous prime is 21090229711. The next prime is 21090229747. The reversal of 21090229741 is 14792209012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21090229741 - 2⁵ = 21090229709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21090229741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21090229747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7885810 + ... + 7888483.

It is an arithmetic number, because the mean of its divisors is an integer number (3028664448).

Almost surely, 2^21090229741 is an apocalyptic number.

It is an amenable number.

21090229741 is a deficient number, since it is larger than the sum of its proper divisors (3139085843).

21090229741 is a wasteful number, since it uses less digits than its factorization.

21090229741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15774491.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 21090229741 in words is "twenty-one billion, ninety million, two hundred twenty-nine thousand, seven hundred forty-one".