21729725410 has 16 divisors (see below), whose sum is σ = 40814093376. Its totient is φ = 8313981808.

The previous prime is 21729725291. The next prime is 21729725447. The reversal of 21729725410 is 1452792712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47238304 + ... + 47238763.

It is an arithmetic number, because the mean of its divisors is an integer number (2550880836).

Almost surely, 2^21729725410 is an apocalyptic number.

21729725410 is a deficient number, since it is larger than the sum of its proper divisors (19084367966).

21729725410 is a wasteful number, since it uses less digits than its factorization.

21729725410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94477097.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 21729725410 in words is "twenty-one billion, seven hundred twenty-nine million, seven hundred twenty-five thousand, four hundred ten".