21630760451605 has 16 divisors (see below), whose sum is σ = 26560743035904. Its totient is φ = 16902060194880.

The previous prime is 21630760451563. The next prime is 21630760451653. The reversal of 21630760451605 is 50615406703612.

It is not a de Polignac number, because 21630760451605 - 2⁷ = 21630760451477 is a prime.

It is a Duffinian number.

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, 45269452 + ... + 45744778.

It is an arithmetic number, because the mean of its divisors is an integer number (1660046439744).

Almost surely, 2^{21630760451605} is an apocalyptic number.

It is an amenable number.

21630760451605 is a deficient number, since it is larger than the sum of its proper divisors (4929982584299).

21630760451605 is a wasteful number, since it uses less digits than its factorization.

21630760451605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687036.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 21630760451605 in words is "twenty-one trillion, six hundred thirty billion, seven hundred sixty million, four hundred fifty-one thousand, six hundred five".