21630765073634 has 8 divisors (see below), whose sum is σ = 32475039998160. Its totient is φ = 10805751740916.

The previous prime is 21630765073627. The next prime is 21630765073667. The reversal of 21630765073634 is 43637056703612.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4815395144 + ... + 4815399635.

It is an arithmetic number, because the mean of its divisors is an integer number (4059379999770).

Almost surely, 2^{21630765073634} is an apocalyptic number.

21630765073634 is a deficient number, since it is larger than the sum of its proper divisors (10844274924526).

21630765073634 is a wasteful number, since it uses less digits than its factorization.

21630765073634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9630795904.

The product of its (nonzero) digits is 11430720, while the sum is 53.

The spelling of 21630765073634 in words is "twenty-one trillion, six hundred thirty billion, seven hundred sixty-five million, seventy-three thousand, six hundred thirty-four".