21729036301 has 32 divisors (see below), whose sum is σ = 25506835200. Its totient is φ = 18126111744.

The previous prime is 21729036299. The next prime is 21729036311. The reversal of 21729036301 is 10363092712.

It is a cyclic number.

It is not a de Polignac number, because 21729036301 - 2¹ = 21729036299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21729036311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36642261 + ... + 36642853.

It is an arithmetic number, because the mean of its divisors is an integer number (797088600).

Almost surely, 2^21729036301 is an apocalyptic number.

It is an amenable number.

21729036301 is a deficient number, since it is larger than the sum of its proper divisors (3777798899).

21729036301 is a wasteful number, since it uses less digits than its factorization.

21729036301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 21729036301 in words is "twenty-one billion, seven hundred twenty-nine million, thirty-six thousand, three hundred one".