21036501501 has 8 divisors (see below), whose sum is σ = 28117248960. Its totient is φ = 13990044192.

The previous prime is 21036501397. The next prime is 21036501503. The reversal of 21036501501 is 10510563012.

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

It is not a de Polignac number, because 21036501501 - 2⁷ = 21036501373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036501503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8571105 + ... + 8573558.

It is an arithmetic number, because the mean of its divisors is an integer number (3514656120).

Almost surely, 2^21036501501 is an apocalyptic number.

It is an amenable number.

21036501501 is a deficient number, since it is larger than the sum of its proper divisors (7080747459).

21036501501 is a wasteful number, since it uses less digits than its factorization.

21036501501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17145075.

The product of its (nonzero) digits is 900, while the sum is 24.

The spelling of 21036501501 in words is "twenty-one billion, thirty-six million, five hundred one thousand, five hundred one".