21520441630774 has 8 divisors (see below), whose sum is σ = 34179524943048. Its totient is φ = 10127266649760.

The previous prime is 21520441630763. The next prime is 21520441630781. The reversal of 21520441630774 is 47703614402512.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316477082772 + ... + 316477082839.

It is an arithmetic number, because the mean of its divisors is an integer number (4272440617881).

Almost surely, 2^{21520441630774} is an apocalyptic number.

21520441630774 is a deficient number, since it is larger than the sum of its proper divisors (12659083312274).

21520441630774 is a wasteful number, since it uses less digits than its factorization.

21520441630774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632954165630.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 21520441630774 in words is "twenty-one trillion, five hundred twenty billion, four hundred forty-one million, six hundred thirty thousand, seven hundred seventy-four".