21036153601 has 4 divisors (see below), whose sum is σ = 22143319600. Its totient is φ = 19928987604.

The previous prime is 21036153599. The next prime is 21036153629. The reversal of 21036153601 is 10635163012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21036153601 - 2¹ = 21036153599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21036153601.

It is not an unprimeable number, because it can be changed into a prime (21036153001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 553582971 + ... + 553583008.

It is an arithmetic number, because the mean of its divisors is an integer number (5535829900).

Almost surely, 2^21036153601 is an apocalyptic number.

It is an amenable number.

21036153601 is a deficient number, since it is larger than the sum of its proper divisors (1107165999).

21036153601 is a wasteful number, since it uses less digits than its factorization.

21036153601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107165998.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 21036153601 in words is "twenty-one billion, thirty-six million, one hundred fifty-three thousand, six hundred one".