21930238049 has 8 divisors (see below), whose sum is σ = 21988418400. Its totient is φ = 21872100096.

The previous prime is 21930238027. The next prime is 21930238063. The reversal of 21930238049 is 94083203912.

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 21930238049 - 2⁸ = 21930237793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21930237997 and 21930238015.

It is not an unprimeable number, because it can be changed into a prime (21930238079) 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, 1206422 + ... + 1224464.

It is an arithmetic number, because the mean of its divisors is an integer number (2748552300).

Almost surely, 2^21930238049 is an apocalyptic number.

It is an amenable number.

21930238049 is a deficient number, since it is larger than the sum of its proper divisors (58180351).

21930238049 is a wasteful number, since it uses less digits than its factorization.

21930238049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21199.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 21930238049 in words is "twenty-one billion, nine hundred thirty million, two hundred thirty-eight thousand, forty-nine".