36545252021 has 4 divisors (see below), whose sum is σ = 37234785132. Its totient is φ = 35855718912.

The previous prime is 36545252017. The next prime is 36545252027. The reversal of 36545252021 is 12025254563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12025254563 = 7 ⋅1717893509.

It can be written as a sum of positive squares in 2 ways, for example, as 20646816100 + 15898435921 = 143690^2 + 126089^2 .

It is a cyclic number.

It is not a de Polignac number, because 36545252021 - 2² = 36545252017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36545252027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344766476 + ... + 344766581.

It is an arithmetic number, because the mean of its divisors is an integer number (9308696283).

Almost surely, 2^36545252021 is an apocalyptic number.

It is an amenable number.

36545252021 is a deficient number, since it is larger than the sum of its proper divisors (689533111).

36545252021 is an equidigital number, since it uses as much as digits as its factorization.

36545252021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689533110.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 36545252021 in words is "thirty-six billion, five hundred forty-five million, two hundred fifty-two thousand, twenty-one".