21243164444630 has 32 divisors (see below), whose sum is σ = 38809322173440. Its totient is φ = 8370243715680.

The previous prime is 21243164444629. The next prime is 21243164444699. The reversal of 21243164444630 is 3644446134212.

It is a congruent number.

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, 29919035 + ... + 30620825.

It is an arithmetic number, because the mean of its divisors is an integer number (1212791317920).

Almost surely, 2^{21243164444630} is an apocalyptic number.

21243164444630 is a deficient number, since it is larger than the sum of its proper divisors (17566157728810).

21243164444630 is a wasteful number, since it uses less digits than its factorization.

21243164444630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747044.

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 21243164444630 in words is "twenty-one trillion, two hundred forty-three billion, one hundred sixty-four million, four hundred forty-four thousand, six hundred thirty".